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6

BASIC OPERATION

DESCRIPTION OF HOIST

The hoist is made up of the following subassemblies:

1.  Hydraulic motor and brake valve

2.  Drum, drum closure, ball bearings and oil seals

3.  Support end plate and bearing support

4.  Motor end plate and motor adapter

5.  Tie plates

6.  Brake clutch assembly

7.  Brake cylinder assembly and multiple-disc brake parts

8.  Primary, second stage and output planetary reducer 

assemblies

9.  Ring gear

THEORY OF OPERATION

The primary sun gear is directly coupled to the hydraulic 

motor by the inner race of the brake clutch assembly. As 

the motor turns in the hoisting direction, the two planetary 

assemblies reduce the input speed of the motor and rotate 

the planetary gearing and the cable drum. The ring gear is 

held stationary by the brake cylinder and the output planet 

carrier is coupled directly to the cable drum causing the 

drum to rotate in the same direction as the motor shaft. 

In the hoisting direction, the static brake remains applied 

and the input shaft rotates freely through the brake clutch. 

When the motor is stopped, the load tries to rotate the 

hoist gear train in the opposite direction. The brake clutch 

immediately locks up, allowing the fully applied static 

brake  to  hold  the  load  firm.  See  “Dual  Brake  System  – 

Operation” for a detailed description of the sequence of 

operation in the lowering direction.

Dual Brake System – Description

The dual brake system consists of a dynamic brake sys-

tem and a static brake system.

The dynamic brake system has two operating compo-

nents:

1. Brake valve assembly

2. Hydraulic motor

The brake valve is basically a counterbalance valve. It 

contains a check valve to allow free flow of oil to the motor 

in the hoisting direction and a pilot operated, spring-load-

ed spool valve that blocks the flow of oil out of the motor 

when the control valve is placed in neutral. When the con-

trol valve is placed in the lowering position, the spool valve 

remains closed until sufficient pilot pressure is applied to 

the end of the spool to shift it against spring pressure and 

open a passage. After the spool valve cracks open, the pi-

lot pressure becomes flow-dependent and modulates the 

spool valve opening which controls the lowering speed. 

See Figures 2, 3, and 4.

The static brake system has three operating compo-

nents:

1. Spring-applied, multiple friction-disc static brake

2. Brake clutch assembly

3. Hydraulic piston and cylinder

Figure 2

Low Pressure

Medium Pressure

High Pressure

Pump

Control

Valve

Motor

Static

Brake

Brake

Valve

To

Tank

Figure 3

Low Pressure

Medium Pressure

High Pressure

Pump

Control

Valve

Motor

Static

Brake

Brake

Valve

To

Tank

Figure 4

Low Pressure

Medium Pressure

High Pressure

Pump

Control

Valve

Motor

Static

Brake

Brake

Valve

To

Tank

Summary of Contents for CH210

Page 1: ...ive collection of winch hoist and drive information on the Internet Most publications and specification sheets are available for downloading WRITE HOIST SERIAL NUMBER BELOW First 2 numbers indicate ye...

Page 2: ...ion 8 Hydraulic Circuit 10 Preventive Maintenance 11 Recommended Gear Oil 12 Inspection Testing Procedure 13 Troubleshooting 16 Exploded view Drawings 20 List of Components 21 Hoist Disassembly 24 Pla...

Page 3: ...eb sites as well as your state s environmental agency Web site https www epa gov http recycleoil org FOREWORD The following service instructions have been prepared to provide assembly disassembly and...

Page 4: ...Drum option 1 Permits testing and inspection per API 2C for offshore cranes Model number and Serial number MODEL NUMBER AND SERIAL NUMBER When information on a hoist is needed always refer to the mod...

Page 5: ...nts listed in the Pre ventive Maintenance section of this manual 9 An equipment warm up procedure is recommended for all start ups and is essential at ambient tempera tures below 40 F 4 C Refer to the...

Page 6: ...for a detailed description of the sequence of operation in the lowering direction Dual Brake System Description The dual brake system consists of a dynamic brake sys tem and a static brake system The...

Page 7: ...motor cannot rotate until sufficient pilot pressure is present to open the brake valve Figures 3 and 4 The friction brake within the hoist will completely release at a pressure lower than that requir...

Page 8: ...se of an oil having a high viscosity index will minimize cold start trouble and reduce the length of warm up periods A high viscosity index will minimize changes in viscos ity with corresponding chang...

Page 9: ...en it is installed on the drum When the wire rope is first installed you should operate the hoist with light to moderate loads with reeving that let s you place these loads on the block and the drum w...

Page 10: ...IC BRAKE BR DR SINGLE SPEED MOTOR CIRCUIT HOIST BRAKE BRAKE VALVE 2 SPEED SELECTOR VALVE PUMP CONTROL VALVE HOIST ASSEMBLY W BRAKE VALVE STATIC BRAKE T P BR DR A TWO SPEED MOTOR CIRCUIT HOIST BRAKE BR...

Page 11: ...40 F 4 C The prime mover should be run at its lowest recommended RPM with the hydraulic hoist control valve in neutral allowing sufficient time to warm up the system The hoist should then be operated...

Page 12: ...ambient temperature Pints Quarts Litre CH210 01 before 7 2003 34 17 16 1 CH210 01 after 7 2003 23 11 5 10 9 CH210 02 60 30 28 4 CH210 03G 36 18 17 CH210 05G 44 22 20 8 CH280A 01 50 25 22 7 CH280A 02 1...

Page 13: ...hoist crane for a minimum of two years from the date of the inspection see Page 3 Perform the PRE USE INSPECTION plus the following 1 Check the lubricant level in the hoist s and maintain it between m...

Page 14: ...rent authorized Service Centers TEARDOWN INSPECTION Any Hoist that has NOT been subject to regular oil sample analysis should un dergo a teardown inspection on an annual 12 month basis Also if a hoist...

Page 15: ...ing order and equipped with all required safety equipment including an anti two blocking device or warning signal and a boom angle and length indicator Two blocking occurs when the load block or hook...

Page 16: ...o remove the pilot ori fice The diameter of the orifice is ap proximately 020 inch Clean and in stall the pilot orifice tightly in the brake valve 2 The friction brake may not be re leasing as a resul...

Page 17: ...medy 3 of Trouble A3 Improper planetary gear oil may cause the brake clutch to slip Drain old gear oil and flush hoist with sol vent Thoroughly drain solvent and refill hoist with recommended plane ta...

Page 18: ...for Trouble D1 and D2 Same as remedies for Trouble E2 Refer to hoist performance charts for additional information Perform rigging service as recom mended by crane manufacturer E 1 Same as D1 2 Be cer...

Page 19: ...ng lay rope There is a distinct advan tage in applying rope of the proper direction of lay When the load is slacked off the several coils on the drum will stay closer together and maintain an even lay...

Page 20: ...20 BRADEN CH210 COMPONENTS Hoist Assembly...

Page 21: ...0 Seal 1 71 Cable Wedge Not Shown 1 72 Plug O Ring Flush 2 103 V Ring Seal 1 105 Drive Screw 4 107 Nameplate 1 108 Closure 1 109 Tie Plate Spacer Not Shown 02 Drum ONLY 4 36 34 39 102 37 37 38 101 38...

Page 22: ...te 1 1 1 8 Brake Plate Spacer 1 1 1 9 Spring 18 15 18 10 Spring Spacer 1 1 1 11 O Ring 1 1 1 12 Back Up Washer 1 1 1 13 O Ring 1 1 1 14 Capscrew 1 2 13 x 1 3 4 G8 Z 4 4 4 15 Lockwasher 1 2 4 4 4 CH210...

Page 23: ...not shown 1 Drum Support Assembly ITEM DESCRIPTION QTY 56 Cap Nut 1 57 Needle Valve 1 59 Male Run Tee 1 77 Hydraulic Motor 1 79 Brake Valve 1 81 Capscrew 1 2 13 X 4 1 2 G8 Sock Hd 4 83 O Ring 1 84 Swi...

Page 24: ...re the hoist was removed from its mounting the oil can be drained by removing the vent plug and sight gauge in the bearing support and turning the hoist up ward on the bearing support end 4 Begin the...

Page 25: ...discard the O ring Item 68 from the OD of the drum closure 10 Install two eyebolts into top end of ring gear Lift ring gear out of drum Remove planet gear sets from drum 11 Lift the cable drum Item 59...

Page 26: ...ly the cage bars If there is any damage that will impair the cage s ability to separate retain and guide the rollers proper ly the bearing should be replaced The thrust washer contact areas should be...

Page 27: ...rs and shafts for ab normal wear or pitting and replace if necessary Assembly 1 Place the output carrier on a clean work surface with the drive pins down Install the output thrust plate Item 102 into...

Page 28: ...esting on the gear teeth Apply grease to the loose rollers Item 4 and set in the lower half of the planet gear Apply grease to one of the thrust washers Item 5 and push onto the planet gear letting th...

Page 29: ...ve pins down Install the output thrust plate Item 8 into the center of the carrier 2 Install the retaining rings Item 6 into the planet gear Item 2 bore and ensure they are seated in the groove Use a...

Page 30: ...nner race 4 The outer race should have one retaining ring Item 47 installed in one end Carefully slide the inner race with bearings and clutch into the outer race Install the other retaining ring into...

Page 31: ...essure plate Item 7 and the springs and spacer Items 9 and 10 from the brake cylinder Clean and Inspect 1 Thoroughly clean and inspect all parts at this time Check sealing surfaces on both the motor a...

Page 32: ...he gap exceeds the maximum limit there may be too many discs in the stack up or the discs are distorted If the gap is less than the minimum there may be too few discs or the discs are worn beyond thei...

Page 33: ...above could also be used 8 Turn the entire assembly over and install the four cap screws and lockwashers After the capscrews make contact with the motor adapter evenly tighten them one turn at a time...

Page 34: ...rest ing on the thrust washer Item 67 which is on the primary planet carrier 8 Install a new bearing in the drum closure if replace ment is necessary making certain to press it against the shoulder i...

Page 35: ...ring onto the hydrau lic motor pilot Engage the motor shaft with the inner race of the overrunning clutch and lower the motor into place Install motor capscrews and lockwashers and torque to correct...

Page 36: ...has been modified to allow for the additional thickness of the spring seat and a groove ma chined into the hex end cap serves as a visual indication that the valve contains the new spring seat The sp...

Page 37: ...inutes before installing them into the brake valve housing This allows O rings to return to their original size after being stretched 2 Install new O rings on the plug and spool retainers 3 Lubricate...

Page 38: ...placing the hoist back in service BRAKE VALVE OPENING PRESSURE TEST Whenever brake components are replaced or a brake component malfunctions or fails the entire brake system should be inspected and t...

Page 39: ...g 60o F pounds sq in PSI X 6 895 kilopascals kPa kilopascals kPa X 0 145 pounds sq in PSI pounds sq in PSI X 0 0703 kilograms sq cm kg cm2 kilograms sq cm kg cm2 X 14 22 pounds sq in PSI pounds sq in...

Page 40: ...LIT2423 R7 November 2018 Printe d in USA 2018 PACCAR Inc All rights reserved...

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