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Zetor PRIMO HT 20 NC Operator'S Manual Download Page 36

PRIMOHT20NC_0006

1

- Beware of the rotary output drive, contact with it can cause fatal injuries. Use protective shields provided 

for additional equipment.

2

-

WARNING

- Connect the additional tools or trailers to the tractor only with the prescribed draw bars or 

hitches.

3

-

WARNING

- Prolonged exposure to noise can cause hearing damage and loss. Use ear protection 

(headphones, earplugs).

GENERAL INFORMATIONS

35

Summary of Contents for PRIMO HT 20 NC

Page 1: ...OPERATOR S MANUAL PRIMO HT 1 2020 20 Tractor is Zetor Since 1946 1 2020 1 2020...

Page 2: ...erfect overview of how to use the tractor with maximum efficiency during various kinds of work If you observe the rules of tractor operation and maintenance and driving safety your new tractor will be...

Page 3: ...2...

Page 4: ...9 Service tractor safely 19 Work in ventilated area 20 Tractor runaway 20 Safety starter switch 20 Safe operation of your tractor 21 Safety Tips During Maintenance 21 Mounting and demounting implement...

Page 5: ...Front and Rear Cutting Height Adjustment 78 Left and Right Cutting Height Adjustment 79 Fasteners torque table ISO 80 Parts Replacement 81 Blade Disassembly 81 Blade Installation 81 Belt Replacement...

Page 6: ...tion Check 107 Fuse Check and Replacement 107 Fuse Box 107 High Capacity Fuse 50 A 108 Light Bulb Replacement 108 Check and Adjustment of Parts 109 Check and Adjustment of Brake Pedal 109 Brake Pedal...

Page 7: ...6...

Page 8: ...ut in a separate document After Sales Service The objective of ZETOR TRACTORS a s company is complete customer satisfaction with the purchased product Any problems with your machine will be solved by...

Page 9: ...NOTES 8...

Page 10: ...s manual Read this Manual carefully and keep it in a convenient place for future reference If at any time you require advice concerning your Tractor do not hesitate to contact your Authorized ZETOR de...

Page 11: ...NOTES 10...

Page 12: ...e top part of the ROPS and be very careful when driving with the ROPS lowered Do not use the seat belt with the ROPS lowered and remember that the folding mechanism is intended for special use only an...

Page 13: ...rning Never attach chains or ropes to the ROPS for towing it will cause the tractor to roll over Always use the points specified on the tractor for towing Be careful when driving through open doors or...

Page 14: ...o select the seat position move the adjustment lever and move the seat closer or further away from the instrument panel and controls Danger Check that the seat is properly locked in its position befor...

Page 15: ...NOTES 14...

Page 16: ...structions Introduction to safety instructions Protection children Carefully read all safety instructions given in this manual for your safety Tempering with any of the safety devices can cause seriou...

Page 17: ...tractor The seat belt must be worn during machine operation when the machine is equipped with a certified ROPS Failure to do so will reduce or eliminate protection for the operator in the event of a r...

Page 18: ...0 Entanglement in rotating shaft can cause serious injury or death Keep PTO shield in place at all times Wear close fitting clothing Stop the engine and be sure PTO drive is stopped before making adju...

Page 19: ...erly installed Replace worn or damaged parts Replace damaged missing plates Remove any accumulated excess grease or oil from the tractor Disconnect the battery ground cable before making adjustments t...

Page 20: ...cause blindness when it gets into the eyes To ensure adequate safety always 1 Refill the batteries in a well ventilated place 2 Wear eye protection and acid resistant gloves 3 Do not inhale the releas...

Page 21: ...pressed 2 Do not by pass this safety starter switch or work on it Only authorized dealers are recommended to work on safety starter switch 3 On some models safety starter switch is provided on transm...

Page 22: ...ly basis check all oil levels Water level in the radiator and electrolyte level in the battery and perform services according to the service schedule 2 Ensure tire pressure are even and the correct pr...

Page 23: ...usty environment with significantly reduced visibility 9 Never start the tractor unless the transmission is in the neutral position the operator is in the driver s seat and there is no other danger wh...

Page 24: ...he fuel in the injection system is under high pressure and can penetrate the skin Unqualified persons must not disassemble or modify the fuel pump injectors nozzles or other parts of the fuel injectio...

Page 25: ...ted by law 15 Dim the tractor lights when meeting approaching vehicles at night Make sure that the lights are adjusted to avoid dazzling the eyes of the oncoming vehicle driver Tractor control 1 Watch...

Page 26: ...d Such blends are more explosive than pure gasoline In a closed container such as a fuel tank DO NOT USE THESE BLENDS 3 Never remove the fuel cap or refuel the tractor with the engine running 4 Do not...

Page 27: ...s up check immediately for any abnormality YES Make sure the radiator is always filled with clean water and use antifreeze in cold weather Drain the system only in case of emergency and refill before...

Page 28: ...DO NOT RUN the engine if all cylinders do not work DO NOT DRIVE with the clutch or brake pedal depressed This leads to excessive wear of the brake lining clutch driven elements and clutch release bear...

Page 29: ...NOTES 28...

Page 30: ...Exterior view PRIMOHT20NC_0001 1 Turn Signal Light R 2 Fender 3 Tire Rear 4 Headlight 5 Tire Front GENERAL INFORMATIONS 29...

Page 31: ...PRIMOHT20NC_0002 1 Steering Wheel 2 Hood 3 Headlight 4 Muffler 5 Turn Signal Light L GENERAL INFORMATIONS 30...

Page 32: ...PRIMOHT20NC_0003 1 Brake Light 2 Turn Signal Light GENERAL INFORMATIONS 31...

Page 33: ...riptions or images When washing with a high pressure water stream detachment may occur Do not use a direct stream of high pressure water to clean the labels If the safety label is damaged or lost orde...

Page 34: ...nstruction may result in accidents and injuries 5 WARNING Extensions alterations cracks damage or corrosion to this structure may adversely affect the functionality of the ROPS 6 The tractor may unexp...

Page 35: ...edal and at the same time secure the parking brake lever 7 WARNING Always turn the controller to the right locked SLOW LOCK position 1 When you drive on the road 2 When you change the blades of the mo...

Page 36: ...rotective shields provided for additional equipment 2 WARNING Connect the additional tools or trailers to the tractor only with the prescribed draw bars or hitches 3 WARNING Prolonged exposure to nois...

Page 37: ...NOTES 36...

Page 38: ...Instruments and Switches PRIMOHT20NC_0007 1 Tachometer 2 Cruise Control Switch 3 Turn Signal Light Switch 4 Light Switch 5 Warning Lights Switch 6 ON OFF PTO Switch 7 Key Switch TRACTOR CONTROLS 37...

Page 39: ...running the engine is switched off ON Position The engine is running and the switch is energized in this position STARTING Position In this position the engine can be started When the key is released...

Page 40: ...ginal diesel according to the required parameters To improve starting power use relevant winter fuel It displays the engine or PTO speed per minute PRIMOHT20NC_0009 Displays the total time the machine...

Page 41: ...ator is in the H red area while driving the coolant is overheated In this case stop and take all necessary steps referred to in the troubleshooting instructions See Troubleshooting NOTE If the engine...

Page 42: ...ight turn signal light and the right turn signal indicator light on the instrument panel flash NOTE This lever does not automatically return to the neutral position Therefore it must be returned to th...

Page 43: ...Signal Indicator Light 4 Right Turn Signal Indicator Light 5 PTO Indicator Light 6 Cruise Control Indicator Light 7 Charge Warning Light 8 Preheating Indicator Light 9 Water Temperature Warning Light...

Page 44: ...also work when the warning lights are switched on Low Beam Light Indicator It comes on when the low beam lights are switched on Fuel Level Warning Light If the fuel gauge needle points to E while dri...

Page 45: ...the operator drives the tractor only if normal engine speed is reached Failure to follow this instruction may result in reduced performance and an accident caused by a system error 8 Engine oil pressu...

Page 46: ...that the PTO is OFF PTO Operation Indicator Light ON The power take off is rotating OFF The power take off is stopped Cruise Control Switch When the switch is pressed to the ON position the cruise con...

Page 47: ...arking Brake Pedal 4 PTO Shift Lever 5 Fuel Tank Cap 6 PTO Switch 7 Position Regulation Lever 8 Reduced and Road Gears Shift Lever 9 Front Axle Drive Shift Lever 4WD 10 Travel Speed Control Pedal 11 J...

Page 48: ...It can lead to excessive acceleration and accident Brake Pedal The brake pedal is located on the left side of the operator It has two functions Stopping the tractor Switching off cruise control 1 Thr...

Page 49: ...nge direction only if the tractor is stopped Only change direction if you are sitting in the operator s seat Parking Brake Pedal 1 To engage the parking brake first depress the brake pedals and depres...

Page 50: ...t lever only when the tractor is stopped and the brake pedal is depressed Shifting the lever while driving can damage the transmission Warning If the gear shift lever is in the H position the speed is...

Page 51: ...TE When using the differential lock the engine must be running at low speed If the differential lock is not disengaged after releasing the differential lock pedal lightly depress the left and right br...

Page 52: ...tions 1 When cultivation of land in the field 2 If traction is required on a slope or on a wet field or when towing a trailer 3 When working in wet or sandy terrain 4 When cultivating hard soil with a...

Page 53: ...wear a seat belt that protects you from rollover or impact Never adjust the seat while driving 1 Seat Position Adjustment PRIMOHT20NC_0041 2 Seat Belt Before driving adjust the length of the belt acc...

Page 54: ...urn the steering wheel while driving at low speed 3 If the steering wheel is turned completely to the stop on one side the safety valve is activated and a beep relief valve sounds If this sound is hea...

Page 55: ...ents To lift the implement pull the lever Lowering Implements To lower the implement push the lever forward Warning Before leaving the tractor seat make sure that you have lowered the implement and st...

Page 56: ...position to prevent the implement from falling When driving on public roads When replacing the rotavator blade or removing straw and grass When performing service work on implements 1 Implement Loweri...

Page 57: ...h to the on position 3 Release the cruise control pedal 2 Turning Cruise Control Off There are two ways to turn off cruise control 1 Turn off by turning the switch to the OFF position or 2 Depress the...

Page 58: ...ilability of the manual in the required language Use of the Machine This machine is designed exclusively for use for normal lawn mowing activities Any other use is considered to be contrary to the int...

Page 59: ...Do not cut near cliffs ditches or embankments If the wheel goes along the edge of the ditch or falls the tractor can overturn suddenly 13 When working on slopes install weights in the wheels to improv...

Page 60: ...or or bystanders If you want to avoid injury make sure that the persons in the vicinity children and pets are at least 25 meters from the tractor during operation If a person enters the safety zone st...

Page 61: ...ways mow grass when driving up or down the slope never mow when driving across the slope 5 Do not use or transport the machine on steep slopes 6 Do not use the machine for mowing wet grass Reduced tra...

Page 62: ...while mowing When mowing adjust the mower deck so that the anti scalp wheel overlaps the edges of the previously mowed lawn This guarantees full coverage of the area to be mowed When mowing the tract...

Page 63: ...mes of the year and under certain conditions the tractor may leave stripes of uncut grass The main cause is tall grass and weeds Under these conditions it may be necessary to mow the lawn once more to...

Page 64: ...vice clean or remove the tractor blockage when the engine is running 7 Check the mower deck blades frequently They must be sharp and free of scratches cracks and must be securely attached 8 Do not han...

Page 65: ...end of each work Reference page 1 Transmission oil leaks check o o o o o o o 2 Transmission oil check o o o o o 3 Transmission oil change oo o 4 Replacement of transmission seal for transmission oil o...

Page 66: ...ver on the right and left sides PRIMOHT20NC_0052 Located on the weldment of the mower deck PRIMOHT20NC_0053 Located on the side cover PRIMOHT20NC_0050 Located on the front of the weldment of the mower...

Page 67: ...front of the weldment of the mower deck PRIMOHT20NC_0054 Located on the weldment of the mower deck PRIMOHT20NC_0056 Located on the front of the weldment of the mower deck 1 1 2 CLEARANCE 2 Hole A GROU...

Page 68: ...PRIMOHT20NC_0057 MOWER DECK 67...

Page 69: ...IMOHT20NC_0058 1 4 WHEELS 2 7 HOLES 50 8 mm 2 inches 3 Cutting Height Indicator 4 Universal Joint 5 290 4 mm 11 4 inches 6 874 mm 34 4 inches 7 18 mm 0 7 inches 8 216 mm 8 5 inches 9 1 370 mm 54 inche...

Page 70: ...Cutting height adjustment Cutting height indicator Wheel height Hole 7 EA Gap between hole inches 0 5 Total hole inches 3 MODEL MM54 Number of blades 3 EA Blade tip speed rpm 14 601 Blade length inch...

Page 71: ...ing parts before use Always wipe the lubrication points with a clean cloth before lubrication Dirt injected into the lubrication points can damage machine parts For all lubrication points listed below...

Page 72: ...e engine and move the hydraulic lever backwards to lift the tractor rear link to the highest position 2 Stop the engine and remove the key 3 From the right slide the mower deck under the tractor or dr...

Page 73: ...the universal joint back and forth to make sure it is securely locked NOTE Finally pull the universal joint to make sure it is locked on the PTO shaft Rear Link 1 Mid PTO Shaft 2 Universal Joint 3 Co...

Page 74: ...connect the rear link to the mower deck Front Link 1 Hook the front link by the groove of the front bracket as shown in the figure NOTE Make sure that the front link is placed in L position in the fir...

Page 75: ...l the U pin and secure it Then lower the front lever 3 Hook the front link by the lever with the pivot point and lift the front lever 4 Release the U pin to secure the front lever NOTE When the front...

Page 76: ...Mower Deck Settings Screw and lock nut play 29 mm 3 mm 1 Lock Nut 2 Screw PRIMOHT20NC_0070 1 29 mm 3 mm PRIMOHT20NC_0071 MOWER DECK 75...

Page 77: ...o the off position and the gear range shift lever to neutral Set the height of the mower deck with the screw initial setting position 1 The tire pressure must be correct 2 Move the hydraulic control l...

Page 78: ...1 3 Screw 2 L PRIMOHT20NC_0075 1 L 2 F 3 R PRIMOHT20NC_0074 MOWER DECK 77...

Page 79: ...ng Height Control PRIMOHT20NC_0076 1 L Position of measurement of the left blade 2 R Position of measurement of the right blade PRIMOHT20NC_0077 1 A Blade height PRIMOHT20NC_0078 1 Screw for precise a...

Page 80: ...lever back to raise the mower deck to the highest position 3 Stop the engine and remove the key 4 Turn the control to adjust the cutting height to the required height 5 Set the anti scalp roller so t...

Page 81: ...M4 2 3 3 4 3 4 4 5 Due to the low flexibility of these fasteners the tightening torque range must be determined individually for each application In general the tightening torque ranges specified for...

Page 82: ...by a hoist or jack Avoid injury when handling blades wear leather gloves or a blade protective cover To remove the blade release the screw securing the blade with the screw wrench When removing the sc...

Page 83: ...he tensioning arm pulley Remove the belt from the transmission pulley Remove the belt from the second tensioning pulley Remove the belt from the mower deck and discard Belt Replacement Guide the belt...

Page 84: ...ry may occur The oil level must always be checked after 24 hours of operation After the initial 50 hours of operation drain the oil and top up the required amount After that the oil should be changed...

Page 85: ...NOTES 84...

Page 86: ...he starter end or safety switch The tractor may drive off unexpectedly and may cause an accident NOTE If the brake pedal is not depressed the engine will not start If the engine is running do not turn...

Page 87: ...temperatures are low the oil cools down its viscosity rises The hydraulic pump cannot suck in the oil which causes a malfunction In winter start idling the engine according to the following instructi...

Page 88: ...le do not park on a slope If parking on a slope is absolutely necessary secure the rear wheels with wedges Driving on a Slope Driving Off on a Steep Slope 1 Press the brake pedals 2 Place the shift le...

Page 89: ...larly to the edge 4 When leaving the field lower the implement so that the front wheels cannot be lifted 5 To use full power it is recommended to reverse into the field Warning When working on a slope...

Page 90: ...riving Engine Oil Pressure Coolant If the coolant gauge needle points to H stop the engine and check the following Radiator coolant Radiator fins for clogging Fan belt for looseness If necessary have...

Page 91: ...NOTES 90...

Page 92: ...e tractor 4 When adjusting the implement apply the parking brake beforehand stop the engine and set the PTO switch to the OFF position 5 Use only towing equipment to tow anything Warning Carefully rea...

Page 93: ...NOTES 92...

Page 94: ...ide the hook to the side Then the hood opens with a click sound 2 Raise the hood with your hands Then the hood opens automatically and secures with a strut 1 Hood Unlock Lever PRIMOHT20NC_0088 1 Hood...

Page 95: ...lement connection condition 3 Open the hood and check Engine oil level Radiator coolant level Fan belt whether it is not loose or damaged 4 Sit in the operator s seat turn the main switch to the ON po...

Page 96: ...freezing may cause damage to the engine Clean the cooler thoroughly before adding antifreeze The ratio of the antifreeze varies by manufacturer and temperature See manufacturer s operating instructio...

Page 97: ...ean water NOTE Do not clean the radiator fins with a stream of water This may deform the fins Oil Check and Replacement Engine Oil and Replacement 1 Check 1 Pull out the dipstick wipe and reinsert The...

Page 98: ...e If you want to use a different oil from a different manufacturer or oil with a different viscosity drain the used oil completely before filling 3 Oil Specification Oil for diesel engines API CD CF T...

Page 99: ...topped 1 Check the transmission fluid through the sight glass to see if the level is between the upper and lower mark 2 In case of insufficient amount of oil refill 1 Transmission Fluid Filler PRIMOHT...

Page 100: ...the filler NOTE The amount of liquid added must not exceed the upper limit Check the liquid before starting the engine or at least 5 minutes after stopping it If you want to use a different fluid fro...

Page 101: ...E The amount of front axle oil added must not exceed the upper limit Check the front axle oil before starting the engine or at least 5 minutes after stopping it If you want to use a different oil from...

Page 102: ...sing touches the sealing surface turn it approximately by 2 3 turn with a wrench 4 Fill the hydraulic oil to the specified level 5 Check the oil level again using the dipstick If the amount is still i...

Page 103: ...ng surface turn it approximately by 2 3 turn with a wrench 3 Fill the engine oil to the specified level 4 Let the engine run for about 5 minutes and check for proper operation with the engine oil warn...

Page 104: ...valve 2 Start the engine 3 Tighten the valve as soon as clean fuel flows out of the bleed valve 4 If the system has not been completely bled repeat the procedure 3 Cleaning and Replacement of the Fuel...

Page 105: ...er 3 Install it tightly so that dust cannot get under the cover 4 Never drive with the element and the filter removed Air Filter Cleaning 1 Blow with the compressed air from the inside of the element...

Page 106: ...from the tractor and charged hydrogen gas is released which poses a risk of fire Charge the battery only in a well ventilated area The battery produces highly flammable hydrogen gas which can explode...

Page 107: ...of the tractor with the discharged battery 1 Negative Terminal Black 2 Positive Terminal Red PRIMOHT20NC_0108 1 Turn off all electrical equipment 2 Use a jump lead to connect the positive terminal of...

Page 108: ...se Box Fuses are installed on the tractor to eliminate a possible accident in the event of an electrical circuit failure If the electrical system does not work while driving check that the fuse is not...

Page 109: ...ulb Replacement If a light does not turn on when the corresponding switch is switched on 1 Check the corresponding fuse 2 If the fuse is OK remove the bulb from the light 3 Remove the bulb from the so...

Page 110: ...t 2 Turn counterclockwise to increase the play turn counterclockwise to decrease the play 3 When the adjustment is complete tighten the lock nut firmly Brake Pedal Play Push the pedal lightly with you...

Page 111: ...force of 13 2 15 4 Ib 6 7 kg If the belt bends by 0 28 0 35 in 7 9 mm it is OK Check of Fuel Hose Main Fuel Filter Check the fuel hose as follows 1 Stop the engine After the engine has cooled down suf...

Page 112: ...Replace if necessary 3 Tighten the clamp Check of Radiator Hose 1 Clamp 2 Radiator Hose Check the radiator hose as follows 1 Stop the engine After the engine has cooled down sufficiently open the hood...

Page 113: ...cation Warning Maintain the prescribed tire pressure to prevent an accident or even death due to a flat tire 1 Insufficient Pressure 2 Normal Pressure 3 Excessive pressure PRIMOHT20NC_0120 Tire Item N...

Page 114: ...urther service inspections always after another 500 hours of operation but no later than 12 months from the previous service inspection Engine Oil and Filter Change The first change of the engine oil...

Page 115: ...x Exchange every 250 hours of operation year Fuel filter cleaning replacement o x Coolant o Every two years Air Filter o o o o x o V belt o Replacement as needed Battery o o o o o o Replacement as nee...

Page 116: ...Oil Drain Hole 3 Engine Oil Check Hole 4 Engine Oil Filler 5 Drain Plug 6 Front Axle Oil Filler 7 Lubrication Point 8 Engine Oil Filler 9 Engine Oil Drain Hole 10 Transmission Oil Filler 11 Filler 12...

Page 117: ...A 2 No Part Oil L gal hst 1 Coolant Antifreeze 3 5 0 9 2 Engine Engine Oil Class Engine oil viscosity Select the appropriate engine oil viscosity based on the ambient temperature and the use of the SA...

Page 118: ...run for 5 minutes so that the oil is evenly distributed in all parts 2 Drain the coolant from the radiator Place a No coolant sign on the steering wheel If the coolant contains antifreeze it is not n...

Page 119: ...damaged the wiring a short circuit can cause a fire Use and Disposal To protect the environment it is recommended to 1 Avoid overloading which can lead to partial combustion and can produce air pollu...

Page 120: ...The starter is running the rotation speed cannot be increased Low battery Charge the battery Poor grounding Clean the contact and ground properly Incorrect engine oil viscosity Replace with engine oil...

Page 121: ...ow idle speed Set to standard speed Defective nozzle Have it repaired by an authorized service Engine overruns Limited regulator Have it repaired by an authorized service Oil level increasing Have it...

Page 122: ...adjusted valve play Have it repaired by an authorized service Incorrect injection timing Have it repaired by a service center Low fuel level Add fuel Clogged air filter Clean the element The engine w...

Page 123: ...SOLUTION Steering system The steering wheel can be turned stiffly or vibrates Incorrect convergence Adjust the convergence Incorrect tire inflation pressure Set the same specified pressure for the le...

Page 124: ...d and trapped rotating part of the lifting shaft Have it repaired by an authorized service Hydraulic pressure cannot be increased Insufficient engine speed Set the speed to 1 000 to 1 500 rpm Insuffic...

Page 125: ...is a sufficient amount of electrolyte and take the necessary measures The lights are not bright enough Low battery charge level Recharge the battery Poor contact on power lines Check the grounding cl...

Page 126: ...type HST Number of speeds 2 ranges Maximum speed mph km h 7 8 12 5 Brakes Wet disc Steering Hydrostatic MODEL PRIMO HT 20NC Hydraulic System Pump type Single speed pump with flow separator Implement...

Page 127: ...ith three point hitch in mm 94 2 2062 Total width in mm 44 5 1135 Wheelbase in mm 53 1 1360 Height to top of ROPS in mm 86 6 2200 Normal Tires Turf tires front 18X8 50 10 4PR Turf tires rear 26X12 00...

Page 128: ...1 Fuel filter PRIMOHT20NC_0124 1 Engine Oil Filter PRIMOHT20NC_0125 1 Filter Element PRIMOHT20NC_0126 Transmission dirt trap PRIMOHT20NC_0127 APPENDIX 127...

Page 129: ...NOTES 128...

Page 130: ...Axle Oil Check and Change 100 Front Link 73 Front Link Assembly 74 Fuel Gauge 39 Fuel System 103 Fuel oil and fluid specification diagram 115 Fuse Box 107 Fuse Check and Replacement 107 G General Inf...

Page 131: ...ings change and service intervals 64 Tachometer 39 Technical data of the middle mower deck 68 The following precautions are suggested to help prevent accidents 23 Throttle Lever 47 Tips for Driving on...

Page 132: ...131...

Page 133: ...Operator s manual Primo HT 20 Edition 1 100 2020 Publication No 222 213 574 09 2020 ZETOR TRACTORS a s Department of Technical Documentation Trnkova 111 628 00 Brno 132...

Page 134: ...www zetor com zetor zetor com Made in EU...

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