New Holland T7.170 Service Manual Download | Manualshive

Page: 52 / 81

background image

HYDRAULIC, PNEUMATIC, ELECTRICAL, ELECTRONIC SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM

BAIL10CVT063FAB

18

Front hydraulic power lift

CLOSED CENTRE LOAD SENSING HIGH PRESSURE HYDRAULIC CIRCUIT

The principal of operation of the closed centre load sensing high pressure hydraulic circuit with variable flow piston
pump is to supply oil flow on demand. It also enables simultaneous operation of the trailer brakes, hydraulic lift,
remote control valve assemblies and front axle suspension where fitted. The load sensing variable flow piston pump
offers significant benefits in reducing the engine power loss that occurs in open centre systems where a high volume
of oil, often far in excess of demand, is continuously pumped round the hydraulic circuit even when they are not being
operated.

A fixed displacement pump (Charge Pump) serves as an initial displacement pump for the variable displacement pump
. The variable displacement pump first of all supplies oil to the trailer brake valve (where fitted), the remote valves
and electronic draft control valve and a pilot oil supply with lower priority. The highest load pressure is indicated to
the flow and compensating valve on the pump via the load sensing line. The flow and compensator valve controls
the pump pressure in such a way that it always exceeds the highest load pressure by a pre-set difference. A priority
valve for low pressure circuit demand is located in the bottom subplate of the remote valve stack. Tractors fitted with
Electro-hydraulic remote valves also have high pressure oil supplied from the variable displacement pump to the top
plate of the remote valve stack. The oil passes through the top plate via a small filter and a pressure limiting valve (

20 - 22 Bar

). The oil is then directed to the pilot oil supply of the electro-hydraulic control valve.

The main filter

(1)

and the charge filter

(2)

Figure

19

are installed on tractors with variable displacement pump (CCLS

system).

1.

Main Intake (Suction) filter

2.

Charge filter

3.

Hydrostat filter

84479148A 15/09/2011

A.10.A / 24

«
...
50
51
52
53
54
...
»

Summary of Contents for T7.170

Page 1: ...nglish October 2011 SERVICE MANUAL T7 170 T7 185 T7 200 T7 210 Tractor Printed in U S A Copyright 2011 CNH America LLC All Rights Reserved New Holland is a registered trademark of CNH America LLC Racine Wisconsin 53404 U S A ...

Page 2: ...50 A FAULT CODES A 50 A ENGINE AND PTO IN B ENGINE B 10 A FUEL AND INJECTION SYSTEM B 20 A AIR INTAKE SYSTEM B 30 A EXHAUST SYSTEM B 40 A EXHAUST SYSTEM Emissions control B 40 B ENGINE COOLANT SYSTEM B 50 A TRANSMISSION DRIVE AND PTO OUT C TRANSMISSION Semi Powershift C 20 D TRANSMISSION Powershift C 20 E TRANSMISSION Continuously Variable Transmission CVT C 20 G ADDITIONAL REDUCERS Overdrive C 30...

Page 3: ...ION Hydraulic D 34 C SUSPENSION Hydraulic D 40 C WHEELS AND TRACKS Wheels D 50 C FRAME AND CAB E FRAME Primary frame E 10 B SHIELD E 20 A USER CONTROLS AND SEAT E 32 A USER PLATFORM E 34 A ENVIRONMENT CONTROL Heating ventilation and air conditioning E 40 D HITCH AND WORKING TOOL H HITCH Front hitch H 10 B HITCH Rear hitch H 10 C HITCH Electronic draft control H 10 D 84479148A 15 09 2011 Find manua...

Page 4: ...84479148A 15 09 2011 Find manuals at https best manuals com ...

Page 5: ...INTRODUCTION 84479148A 15 09 2011 1 Find manuals at https best manuals com ...

Page 6: ...oreword 4 Foreword Ecology and the Environment 9 Safety rules 10 Torque 14 Basic instructions 16 Conversion factors 18 Consumables Lubrications and Coolants 19 Capacities 22 84479148A 15 09 2011 2 Find manuals at https best manuals com ...

Page 7: ...bution chain including without limitation national regional or local dealers reject any responsibility for damages due to the anomalous behavior of parts and or components not approved by the manufacturer himself including those used for the servicing or repair of the product manufactured or marketed by the Manufacturer In any case no warranty is given or attributed on the product manufactured or ...

Page 8: ...it works the diagnostic data fault codes and troubleshooting and the service data remove install adjust etc By integrating this new ICE coding into technical information you will be able to search and retrieve just the right piece of technical information you need to resolve that customers concern on his machine This is made possible by attaching 3 categories to each piece of technical information...

Page 9: ...ical electrical or hydraulic devices components and assemblies Sections Sections are grouped according to the main functions or a systems on the machine Each Section is identified by a letter A B C etc The amount of Sections included in the manual will depend on the type and function of the machine that the manual is written for Each Section has a Contents page listed in alphabetic numeric order T...

Page 10: ...ctions related to the positioning of the machine frame are included in Section F Frame Positioning FRAME POSITIONING F This Section covers all the main functions and systems related to positioning of the machine frame or to positioning the attachment on the supporting machine frame TOOL POSITIONING G This Section covers all the functions related to the final and or automatic positioning of the too...

Page 11: ...st etc and diagnostic data fault codes and troubleshooting that have been written in that Chapter for that function or system on the machine Contents ENGINE AND PTO IN ENGINE _ 10 A TECHNICAL DATA ENGINE General specification B 10 A FUNCTIONAL DATA ENGINE Dynamic description B 10 A SERVICE ENGINE Remove B 10 A DIAGNOSTIC ENGINE Troubleshooting B 10 A INDEX The Chapter Index lists in alphabetical o...

Page 12: ...ormation type A corresponds to the sections of the repair manual B corresponds to the chapters of the repair manual C corresponds to the type of information listed in the chapter contents Technical Data Functional Data Diag nostic or Service A and B are also shown in the page numbering on the page footer THE REST OF THE CODING IS NOT LISTED IN ALPHANUMERIC ORDER IN THIS MANUAL You will find a tabl...

Page 13: ...ain substances which may be harmful to your health Modern oils contain additives Do not burn contaminated fuels and or waste oils in ordinary heating systems Avoid spillage when draining off used engine coolant mixtures engine gearbox and hydraulic oils brake fluids etc Do not mix drained brake fluids or fuels with lubricants Store them safely until they can be disposed of in a proper way to compl...

Page 14: ...tion which if not avoided could result in minor or moderate injury The color associated with CAUTION is YELLOW FAILURE TO FOLLOW DANGER WARNING AND CAUTION MESSAGES COULD RESULT IN DEATH OR SERIOUS INJURY NOTICE Install new decals if the old decals are destroyed lost painted over or cannot be read When parts are replaced that have decals make sure you install a new decal with each new part MACHINE...

Page 15: ...mmended by the accumulator manufacturer Take care not to exceed the maximum allowed pressure of the accumulator After any check or adjustment check for leakages or gas in the hoses or pipes SAFETY RULES General guidelines Carefully follow specified repair and maintenance procedures When appropriate use P P E Personal Protective Equipment Do not wear rings wristwatches jewellery unbuttoned or loose...

Page 16: ...equest the assistance of an operator in the driver s seat The operator must maintain visual contact with the service technician at all times If operating outside the workshop position the machine on a flat surface and lock in position If working on a slope lock the machine in position Move to a flat area as soon as is safely possible Damaged or bent chains or cables are unreliable Do not use them ...

Page 17: ...manufacturer Periodically check the rims and tires for damage Stand away from at the side of the tire when checking inflation pressure Do not use parts of recovered wheels as incorrect welding brazing or heating may weaken and eventually cause damage to the wheel Never cut or weld a rim mounted with an inflated tire Deflate the tire before removing any objects that may be jammed in the tire tread ...

Page 18: ... 3 N m 14 2 lb ft 31 5 N m 23 2 lb ft M10 48 7 N m 35 9 lb ft 26 8 N m 19 8 lb ft 43 8 N m 32 3 lb ft 69 5 N m 51 3 lb ft 38 2 N m 28 2 lb ft 62 5 N m 46 1 lb ft M12 85 N m 62 7 lb ft 46 7 N m 34 4 lb ft 76 5 N m 56 4 lb ft 121 N m 89 2 lb ft 66 5 N m 49 0 lb ft 108 9 N m 80 3 lb ft M14 135 N m 99 6 lb ft 74 2 N m 54 7 lb ft 121 5 N m 89 6 lb ft 193 N m 142 3 lb ft 106 1 N m 78 3 lb ft 173 7 N m 1...

Page 19: ...INTRODUCTION ZEIL06CS0136F0A 2 ZEIL06CS0135F0A 3 84479148A 15 09 2011 15 ...

Page 20: ...lip on double lip seals with grease insert the seal in its seat and press down using a flat punch do not tap the seal with a hammer or mallet whilst inserting the seal check that it is perpendicular to the seat once settled make sure that it makes contact with the thrust element if required to prevent damaging the seal lip on the shaft position a protective guard during installation operations O R...

Page 21: ...d on the unit the battery ground cable must be disconnected from the battery The electronic monitoring system and charging system will be damaged if this is not done SPARE PARTS Only use CNH Original Parts or NEW HOLLAND AGRICULTURE Parts Only genuine spare parts guarantee the same quality duration and safety as original parts as they are the same parts that are assembled during standard productio...

Page 22: ...e 1 litre 1 057 US quart 1 US quart 0 9464 litre 1 cm cc 0 061 in 1 in 16 38 cm cc 1 m 35 31 ft 1 ft 0 028 m 1 ml 0 033 US fl oz 1 US fl oz 29 57 ml Mass 1 kg 2 204 lb 1 lb 0 4536 kg Torque 1 N m 0 7376 lb ft 1 lb ft 1 3558 N m Power 1 kW 1 358 Hp 1 Hp 0 746 kW Pressure 1 bar 100 kPa 1 bar 14 505 psi 1 psi 0 06894 bar Temperature 1 C 1 8 x C 32 F 1 F 0 56 x F 32 C Flow 1 l min 0 2642 US gpm 1 US g...

Page 23: ...il has been approved for use in the transmission 4WD front axle and hubs and the hydraulic system of your tractor Although the oil is 90 biodegradable it is important to follow safe handling and disposal practices Biodegradable oil should not be used in conjunction with other oils Use the following procedure to replace standard oil with biodegradable lubricant 1 Operate the tractor until the oil t...

Page 24: ...ifreeze is not available use clean water premixed with 5 chemical inhibitor The inhibitor is available from your authorised dealer Lubrications and Coolant Specifications RECOMMENDED FLUIDS AND APPLICATIONS NH SPECIFICATION INTERNATIONAL SPECIFICATION ENGINE OIL NEW HOLLAND AMBRA MASTERGOLD HSP ENGINE OIL SAE 15W 40 NEW HOLLAND AMBRA MASTERGOLD HSP ENGINE OIL SAE 10W 30 NH 330 H NH 324 H API CI 4 ...

Page 25: ...INTRODUCTION Regarding filling quantity see Capacities 84479148A 15 09 2011 21 ...

Page 26: ...T HUBS Class 4 Axle less brakes 3 6 l 0 95 US gal 4WD FRONT HUBS Class 4 Axle with brakes 4 0 l 1 06 US gal FRONT P T O 0 5 l 0 13 US gal UNIT T7 170 AC T7 185 AC T7 200 AC T7 210 AC FUEL TANK 270 l 71 3 US gal AUXILIARY FUEL TANK 70 l 18 5 US gal DEF AdBlue TANK 51 l 13 5 US gal COOLING SYSTEM 26 l 6 9 US gal ENGINE including filter 15 l 3 96 US gal TRANSMISSION REAR AXLE HYDRAULICS 65 l 17 2 US ...

Page 27: ...T7 170 AutoCommand T7 170 Power Command T7 170 Range Command T7 185 AutoCommand T7 185 Power Command T7 185 Range Command T7 200 AutoCommand T7 200 Power Command T7 200 Range Command T7 210 AutoCommand T7 210 Power Command T7 210 Range Command 84479148A 15 09 2011 A ...

Page 28: ...d T7 210 Power Command T7 210 Range Command HYDRAULIC COMMAND SYSTEM A 14 A T7 170 AutoCommand T7 170 Power Command T7 170 Range Command T7 185 AutoCommand T7 185 Power Command T7 185 Range Command T7 200 AutoCommand T7 200 Power Command T7 200 Range Command T7 210 AutoCommand T7 210 Power Command T7 210 Range Command PNEUMATIC SYSTEM A 20 A T7 170 AutoCommand T7 170 Power Command T7 170 Range Com...

Page 29: ...EM 10 A T7 170 AutoCommand T7 170 Power Command T7 170 Range Command T7 185 AutoCommand T7 185 Power Command T7 185 Range Command T7 200 AutoCommand T7 200 Power Command T7 200 Range Command T7 210 AutoCommand T7 210 Power Command T7 210 Range Command 84479148A 15 09 2011 A 10 A 1 ...

Page 30: ...7 200 Power Command T7 210 Range Command T7 210 Power Command Static description 17 T7 170 AutoCommand T7 185 AutoCommand T7 200 AutoCommand T7 210 AutoCommand Hydraulic schema 31 T7 170 AutoCommand T7 185 AutoCommand T7 200 AutoCommand T7 210 AutoCommand Power beyond Exploded view 35 Hydraulic pump Variable displacement pump Dynamic description 36 Compensator Exploded view 38 SERVICE PRIMARY HYDR...

Page 31: ...HYDRAULIC PNEUMATIC ELECTRICAL ELECTRONIC SYSTEMS PRIMARY HYDRAULIC POWER SYSTEM Power beyond Torque BAIL10CVT060FAB 1 84479148A 15 09 2011 A 10 A 3 ...

Page 32: ...ston Pump displacement High flow 63 cm rev Low Standby Pressure 26 bar 377 0 psi 1 bar 14 5 psi Low Standby Pressure with Italian trailer brakes 36 bar 522 0 psi High Standby Pressure 210 bar 3045 00 psi 5 bar 72 5 psi Maximum system pressure 245 bar 3552 5 psi 5 bar 72 5 psi Cooler By Pass valve 5 8 bar 84 1 psi Charge Pump Type Internal rotor gear pump Charge Pump displacement 74 cm rev Standard...

Page 33: ...lacement 74 cm rev Standard flow 82 cm rev High flow Output engine speed 2200 RPM Standard flow 250 l min 66 US gpm Output engine speed 2200 RPM Hi flow 250 l min 66 US gpm Charge pressure filter dump valve Crack open 10 bar 145 0 psi Fully open 15 bar 217 5 psi Charge pressure 2 4 bar 29 0 58 0 psi Charge pressure switch closes 1 bar 14 5 psi 84479148A 15 09 2011 A 10 A 5 ...

Page 34: ...r and Cylinders Low Pressure Circuit Independent Power Take Off PTO Differential Lock Front Wheel Drive engagement Transmission clutch and synchroniser engagement Creeper engagement Where fitted Front PTO Where fitted 50 kph engagement Where fitted Lubrication Circuit PTO Clutch Plates Transmission Clutch Plates Transmission Shaft Pressure Lube Pump Drive Gear Bearing Hydraulic Lift Cross Shaft Op...

Page 35: ...ment pump and filter assembly BAIL07APH323ASA 1 Closed centre remote valves There are two types of remote valves available for the closed centre system Standard fitting are the mechanical remote valves operated via a cable from within the cab and optional are electro hydraulically operated valves 1 Figure 2 which are operated by electrical switches and have their own in built processor to control ...

Page 36: ...ity control knob 2 Drop rate control knob 3 Height limit control knob 4 Slip limit control knob BRL6436B 5 1 Wheel slip control knob 2 EHR Function control knob 3 Front hitch height limit control knob 4 Drop rate control knob 5 Draft sensitivity control knob 6 Rear hitch height limit control knob 84479148A 15 09 2011 A 10 A 8 ...

Page 37: ...ch BRK5798B 7 The raise and lowering functions of the electronic draft control lift system can also be operated from the rear fender switches 1 and 2 BSE3774A 8 Mechanical remote control valves 1 are also available with electronic draft control 2 Mechanical remotes are also available with a combination configurable and non configurable valve slices See Table 1 84479148A 15 09 2011 A 10 A 9 ...

Page 38: ...occurs in open centre systems where a high volume of oil often far in excess of demand is continuously pumped round the hydraulic circuit even when they are not being operated A fixed displacement pump Charge Pump serves as an initial displacement pump for the variable displacement pump The variable displacement pump first of all supplies oil to the trailer brake valve where fitted the remote valv...

Page 39: ...ensing Line 7 Lubrication Manifold 8 Low Pressure Feed to 50 km h 19th Gear Clutch Manifold 9 Variable Displacement Pump 10 Flow and Pressure Compensator Valve 11 High Pressure Feed to Electro Hydraulic Remote Valves 12 Return line from Hydraulic Lift Cylinder 13 Feed to trailer brake Coupler The main filter 1 and the charge filter 2 Figure 12 are installed on tractors with variable displacement p...

Page 40: ...m Variable Displacement Pump CCLS Electrical Switches 1 Low Charge Pressure Warning Switch 2 Intake Filter restriction vacuum Switch 3 Low Oil Temperature Switch BAIL07APH325ASA 14 Mid Mount Remote Valves Optional additional remote valves are mounted under the cab Connected into the high pressure oil line supplied from the hydraulic pump after the trailer brake valve and operated via a joystick co...

Page 41: ... the suspension cylinder Refer to SUSPENSION Hydraulic Static description D 40 C BAIL10CVT051AAB 16 Front Axle Suspension Cylinder BSE3769A 17 Steering Motor There are two types of steering motors fitted depending on whether the tractor is with or less Supersteer The with Supersteer models are of a Dynamic load sensing type with a variable displacement depending on the speed the steering wheel is ...

Page 42: ...lectronic Draft Control valve and between the trailer brake valve front sus pension valve and mid mounted valves where fitted is the load sensing shuttle valve 2 Figure 20 This allows the function with the highest pressure demand to send sensing pressure to the load sensing valve Figure 21 on the variable displacement pump BSB0388A_436 20 1 Load Sensing Line 2 Pressure Compensator Valve 3 Flow Com...

Page 43: ...ump to adjust output to circuit demand High Pressure oil is fed to a subplate at the bottom of the remote valve stack where it is directed to the Trailer Brake valve which has priority for safety reasons The oil is then redirected to the Electronic Draft Control Valve and the Electro Hydraulic Remote Valves Within the subplate is a pressure compensating valve which diverts the oil to the low press...

Page 44: ...ted in the transmission top cover will operate to ensure that adequate flow to the lubrication circuit is maintained This feature of diverting oil from the cooler assists in aiding a rapid warm up of oil in cold weather con ditions The steering pump steering return oil is directed through the oil cooler at the front of the tractor and is limited to a maximum pressure of 5 59 bar 81 06 psi by the l...

Page 45: ...l Drive engagement Transmission clutch and synchroniser engagement Creeper engagement Where fitted Front PTO Where fitted 50 kph engagement Where fitted Hydrostatic Unit Lubrication Circuit PTO Clutch Plates Transmission Clutch Plates Transmission Shaft Pressure Lube Pump Drive Gear Bearing Hydraulic Lift Cross Shaft Options Configurations Hydraulic Pump HPL Remote Valve Options Less Hydraulic Tra...

Page 46: ...0 Trailer brake valve The high pressure circuit is of the Closed Centre Load Sensing design on all tractor model options fed by a Variable Displacement Pump Figure 2 shows the variable displacement pump 1 and suction filter assembly 2 When the oil is cold and pressure differential across the oil cooler is higher than 5 C 41 0 F the cooler by pass valve located in the charge pump will operate to en...

Page 47: ...d on the right hand side of the rear axle housing is a resounding filter assembly BAIL10CVT039AAB 4 The priority valve 1 located on the top of the main pump diverts high pressure oil to the steering the trailer brake valve where fitted 2 and high pressure circuit Refer to Priority valve Dynamic description A 14 A BAIL10CVT041AAB 5 Closed centre remote valves 84479148A 15 09 2011 A 10 A 19 ...

Page 48: ...hanical remote control valves 1 are also available with electronic draft control 2 Mechanical remotes are also available with a combination configurable and non configurable valve slices See Table 1 BRE1744B 7 The hydraulic lift Electronic Draft Control valve EDC valve is a stack type proportional solenoid operated valve 1 mounted with the remote control valves at the rear of the tractor Refer to ...

Page 49: ...ear hitch height limit control knob BAIL07APH331ASA 10 1 Stop adjuster thumbwheel 2 Position control lever 3 Draft loading wheel 4 Raise lower switch BRE1481B 11 The raise and lowering functions of the electronic draft control lift system can also be operated from the rear fender switch 1 The raise and lowering functions of the electronic draft control lift system can also be operated from the rea...

Page 50: ...t system can also be operated from the rear fender switches 1 and 2 BSF3967A_430 13 Located below the Electronic Draft Control valve Where fitted is the Hydraulic Power Tapping port Power Beyond block This includes a priority valve and also a low pressure regulating valve 1 BSE3845A 14 1 Power Beyond Ports 2 Pressure Relief Valve 84479148A 15 09 2011 A 10 A 22 ...

Page 51: ... The Power beyond hydraulic return port is used to reduce back pressure in the remote hydraulic return line and create more efficient motor operation The motor return circuit is also used where a return circuit with low back pressure is desired for improved implement operation BAIL10CVT051AAB 17 Suspension valve 1 Refer to SUSPENSION Hydraulic Static description D 40 C 84479148A 15 09 2011 A 10 A ...

Page 52: ...ement pump first of all supplies oil to the trailer brake valve where fitted the remote valves and electronic draft control valve and a pilot oil supply with lower priority The highest load pressure is indicated to the flow and compensating valve on the pump via the load sensing line The flow and compensator valve controls the pump pressure in such a way that it always exceeds the highest load pre...

Page 53: ...m Variable Displacement Pump CCLS Electrical Switches 1 Low Charge Pressure Warning Switch 2 Intake Filter restriction vacuum Switch 3 Low Oil Temperature Switch BAIL10CVT058AAB 21 Mid Mount Remote Valves Optional additional remote valves are mounted under the cab Connected into the high pressure oil line supplied from the hydraulic pump after the trailer brake valve and operated via a joystick co...

Page 54: ... the suspension cylinder Refer to SUSPENSION Hydraulic Static description D 40 C BAIL10CVT051AAB 23 Front Axle Suspension Cylinder BSE3769A 24 Steering Motor There are two types of steering motors fitted depending on whether the tractor is with or less Supersteer The with Supersteer models are of a Dynamic load sensing type with a variable displacement depending on the speed the steering wheel is ...

Page 55: ...lve Located in each remote valve slice the Electronic Draft Control valve and between the trailer brake valve front sus pension valve and mid mounted valves where fitted is the load sensing shuttle valve 2 Figure 27 This allows the function with the highest pressure demand to send sensing pressure to the load sensing valve Figure 28 on the variable displacement pump BSB0388A_436 27 84479148A 15 09...

Page 56: ...st output to circuit demand High Pressure oil is fed to a subplate at the bottom of the remote valve stack where it is directed to the Trailer Brake valve which has priority for safety reasons The oil is then redirected to the Electronic Draft Control Valve and the Electro Hydraulic Remote Valves Within the subplate is a pressure compensating valve which diverts the oil to the low pressure system ...

Page 57: ...istribution manifold 1 Figure 31 BAIL10CVT040AAB 31 The hydrostatic unit is located in the flywheel housing of the transmission To maintain the temperature in the hydro static unit at a constant level a certain amount of oil from the closed circuit is steadily replaced with oil from the feed line The flushing valve flushes out a fixed amount of oil from the low pressure side of the circuit and cha...

Page 58: ...HYDRAULIC PNEUMATIC ELECTRICAL ELECTRONIC SYSTEMS PRIMARY HYDRAULIC POWER SYSTEM 84479148A 15 09 2011 A 10 A 30 ...

Page 59: ...RAULIC POWER SYSTEM Electro hydraulic remote valve Hydraulic schema A 10 C 10 Electro hydraulic remote valve 11 Electro hydraulic remote valve 12 Electro hydraulic remote valve 13 Diverter valve for hydraulic top link and right hand adjustable link 14 Electronic draft control valve 15 Bottom plate with priority valve 16 Resounding Filter Damper 17 Gear pump 18 Filter assembly 19 Low pressure distr...

Page 60: ...HYDRAULIC PNEUMATIC ELECTRICAL ELECTRONIC SYSTEMS PRIMARY HYDRAULIC POWER SYSTEM 1 2 3 indicate connection locations for item 24 When fitted 84479148A 15 09 2011 A 10 A 32 ...

Page 61: ...HYDRAULIC PNEUMATIC ELECTRICAL ELECTRONIC SYSTEMS PRIMARY HYDRAULIC POWER SYSTEM BAIL10CVT161ASC 1 84479148A 15 09 2011 A 10 A 33 ...

Page 62: ...HYDRAULIC PNEUMATIC ELECTRICAL ELECTRONIC SYSTEMS PRIMARY HYDRAULIC POWER SYSTEM 84479148A 15 09 2011 A 10 A 34 ...

Page 63: ...RY HYDRAULIC POWER SYSTEM Power beyond Exploded view BAIL10CVT059FAB 1 1 Pressure feed coupler 2 Power beyond manifold 3 Seals 4 Seal 5 Compression spring 6 Shuttle valve 7 Seal 8 Seal 9 Return coupler 10 Load sensing coupler 84479148A 15 09 2011 A 10 A 35 ...

Page 64: ...tinually provide oil flow and absorb engine power even when the hydraulic circuits do not require the total pump output bsd2188A 1 1 Stroke Control Piston 2 Rod 3 Swash Plate Return Spring 4 Driveshaft 5 Swash Plate 6 Slipper Quantity 9 7 Piston and Barrel Quantity 9 8 Inlet Port 9 Shaft Pre Load Spring 10 Outlet Port The major components of the variable flow piston pump with closed centre load se...

Page 65: ...otate but pivots about the front of the pumping head is the control mechanism that limits the stroke of each piston and works in conjunction with the pressure and flow compensating valves in the load sensing line As the pumping head rotates each barrel passes over the inlet 8 and then the outlet ports 10 of the pump During the inlet cycle for each piston and barrel oil is pumped into the barrel pu...

Page 66: ...w BSE3586A_454 1 Flow and Pressure Compensating Valves 1 Plug 2 Seal 3 Disc 4 Spring 5 Spring 6 Seat 7 Housing 8 Screw 9 Spool 10 Snap ring 11 Plug 12 Plug 13 Seal 14 Seal 15 Damper Screw 16 Nozzle 17 Seat 18 Spring 19 Spring 20 Disc 21 Seal 22 Plug 23 Nut 24 Screw 25 Locknut 84479148A 15 09 2011 A 10 A 38 ...

Page 67: ...ing hazard Before servicing or repairing machines equipped with front suspension always do the following Place the keyswitch in the OFF position Place the suspension ON OFF switch in the OFF position Fully lower the axle to the bottom mechanical stop Failure to comply will result in death or serious injury D0038A To determine if the hydraulic system and the various hydraulic components are working...

Page 68: ...t a DATAR pressure transducer to the DATARScope interface channel B BAIL10CVT613AVA 3 5 Install the a DATARScope pressure transducer to the 3 bar lubrication line and connect to the DATARScope interface channel C BAIL10CVT614AVA 4 6 Connect the DATAR flow meter to the rear EHRs NOTE Use two different spool valves to reduce the back pressure within the flow meter BAIL10CVT607AVA 5 84479148A 15 09 2...

Page 69: ...annel B Steering signal line Setting 300 bar Transducer setting 600 bar Channel C Lubrication line Setting 10 bar Transducer setting 60 bar Channel D Pressure from the EHRs Setting 300 bar Transducer setting 600 bar 9 Start the engine and run until normal operating tem perature is reached 10 Set the EHR flow control to 100 11 Put remote 1 into the extend position and remote 2 into the float positi...

Page 70: ...teering demands hydraulic oil from the pump 1 Due to the load on the hydraulic oil pump from the EHRs the oil supply is taken very briefly from the EHRs 2 and supplied as a priority to the steering When the steering wheel is turned slowly the hydraulic oil pump can cope with supplying both systems and therefore pressure and supply from the EHRs is not affected Within the graphic the steering syste...

Page 71: ...nd Accumulator Pressure Test 17 Using special tool 380000573 1 connect into the low pressure line behind the valve stack Connect a DATAR pressure transducer to the spe cial tool and connect to the DATARScope interface channel A BAIL11CVT641AVA 9 18 Remove the cab floor mat BAIL07APH389AVA 10 84479148A 15 09 2011 A 10 A 43 ...

Page 72: ...pressure transducer to the DATARScope interface channel C BAIL10CVT614AVA 12 21 Disconnect the hydrostat electrical connector and remove the hydrostat gear pump pressure switch transducer BAIL10CVT615AVA 13 22 Install a test port into the gear pump filter pressure line and connect to a DATARScope pressure trans ducer Connect to the DATARScope interface channel B BAIL10CVT610AVA 14 84479148A 15 09 ...

Page 73: ...nd capture the results 25 The low pressure 1 at idle should be 24 bar 26 The lube pressure 3 at idle should be 3 bar 27 The low pressure gear pump filter pressure and lube pressure all rise 4 when the engine speed is raised to maximum RPM This shows the circuit pres sure control valves balancing the pressure between the low pressure and lubrication pressure circuits The difference in these pressur...

Page 74: ...HYDRAULIC PNEUMATIC ELECTRICAL ELECTRONIC SYSTEMS PRIMARY HYDRAULIC POWER SYSTEM BAIL11CVT639FVA 16 84479148A 15 09 2011 A 10 A 46 ...

Page 75: ...pump installed on the tractor Blocked filter dump valve Pressure and flow compensating valves Steering flow control valve Priority valve Steering pump assembly 1 Remove the pump Refer to Hydraulic pump Vari able displacement pump Remove A 10 A BAIL08CVT075ASA 1 2 Remove pressure and flow compensating valves as sembly Refer to Compensator Overhaul A 10 A BSD2023A 2 3 Undo the 4 retaining bolts 1 an...

Page 76: ...haft seal retaining ring 1b0o2004061061 5 6 With the retaining ring removed use a punch or sim ilar tool and carefully pierce the top of the lip seal Using the punch pry the seal from its bore 70 421 485 6 7 Examine valve plate 1 Check to see if it is scored nicked warped or damaged by cavitation Look for score marks or damage around the bearing surface area Check the inlet and discharge port area...

Page 77: ...e pumping head and slipper assembly and inspect for damage Where damage is identified the pumping element must be replaced Pumping head and slipper assembly 1 Pistons and slippers 2 Cone 3 Washer 4 Pumping head 5 Pins quantity 3 TIA35168 10 11 If necessary disassemble pumping head spring as sembly by compressing the retaining ring against the spring Pumping head spring assembly 1 Washer 2 Retainin...

Page 78: ...C PNEUMATIC ELECTRICAL ELECTRONIC SYSTEMS PRIMARY HYDRAULIC POWER SYSTEM 12 Remove swash plate 1 assembly Inspect components for wear and replace if damaged or worn 70 421 461 12 84479148A 15 09 2011 A 10 A 50 ...

Page 79: ... are very heavy Always use a wheel remover or chain hoists to remove and install the wheels Use an assistant as required Failure to comply could result in death or serious injury W0149A Raise the rear of the tractor and place two suitable axle stands 1 under the final drive cases NOTE If required detach the lift rods from the lower links BTB0281A 1 2 Using a wheel removal tool remove the rear righ...

Page 80: ... wait a few mo ments for the oil to drain back to the reservoir Remove the main hydraulic oil filter housing drain plug 2 and drain the oil into a suitable container BAIL10CVT628AVA 5 6 Disconnect the main filter fittings and remove the hy draulic oil filter BAIL08CVT263AVA 6 7 Using a suitable filter removal tool remove the charge filter BAIL10CVT630AVA 7 84479148A 15 09 2011 A 10 A 52 ...

Page 81: ...This as a preview PDF file from best manuals com Download full PDF manual at best manuals com ...

Reviews:

No comments

Related manuals for T7.170

Brand: MTD Pages: 2

Brand: New Holland Pages: 81

Brand: Camoplast Pages: 16

Brand: Field Tuff Pages: 4

Brand: Komatsu Pages: 4

FARMALL 105U EP

Brand: Case Pages: 61

Brand: MTD Pages: 33

Brand: Worksaver Pages: 36

Brand: Worksaver Pages: 42

Brand: Textron Pages: 150

Brand: Secura Pages: 12

Brand: Meyer Pages: 12

ENVIRO Cover Deployer 800

Brand: EPI Pages: 35

Brands by name

0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Popular brands

Load more brands