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31

BRAKE CLUTCH SERVICE

DISASSEMBLY

1.   Remove the snap ring and sprag bushing retainer from 

one end only.

2.   Pull the inner race out.  Examine the race for scoring, 

wear or indentations caused by the sprag cams.  If the 
inner race is not completely smooth, the entire brake 
clutch assembly must be replaced.

3.  Use a screwdriver and mallet to remove the sprag 

bushing from one end of the outer race. There are four 
special cut-outs in the bushing for this purpose.  Be 
careful not to damage the bushing inside surface.  If 
a bushing’s inside surface is damaged or shows wear, 
replace it..

4.  Next, slide the sprag clutch out, inspect the sprag 

clutch closely for abnormal wear, cracks, pitting or cor-
rosion.  Check small clips for breakage or bright spots; 
the signs of excessive wear.  Unless the outer race 
or remaining sprag bushing is damaged or shows ex-
cessive wear, there is no need for further disassembly.  
If disassembly is necessary, remove the bushing ac-
cording to the procedure covered in Step No. three (3).  
All brake clutch assembly parts should be thoroughly 
cleaned and inspected before assembly.

ASSEMBLY

1.  Press a sprag bushing into the outer race, using a 

mechanical or hydraulic press.  A fl at plate of approxi-
mately the same diameter as the bushing fl ange  out-
side diameter should be placed between the press and 
bushing during assembly to protect the bushing.  Be 
certain the bushing fl ange is against the shoulder in 
the outer race.

The polished surfaces of the races and sprag cams 
must be perfectly smooth to insure positive engage-
ment of the clutch.  The slightest defect may reduce 
brake clutch effectiveness, which could result in prop-
erty damage, severe personal injury or death.  It is 
generally recommended to replace the entire brake 
clutch assembly if any component is defective.

CAUTION

WARNING

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Содержание Braden BA2A

Страница 1: ...ROKEN ARROW OK U S A 74013 PHONE 918 251 8511 FAX 918 259 1575 www paccarwinch com LIT2382 R2 2 2010 Printed in U S A Copyright 2010 PACCAR Winch Division All rights reserved BA2A AIR WINCH Installati...

Страница 2: ...2...

Страница 3: ...ROUBLESHOOTING 20 SERVICE PRECAUTIONS 23 WINCH DISASSEMBLY 24 WINCH CROSS SECTION 26 WINCH ASSEMBLY 28 PLANET CARRIER SERVICE 29 BRAKE CLUTCH SERVICE 31 AIR MOTOR SERVICE 33 BAND BRAKE ADJUSTMENT 35 S...

Страница 4: ...251 8511 08 00 16 30 hours CST Monday through Friday FAX 1 918 259 1575 www paccarwinch com MODEL NUMBER AND SERIAL NUMBER When information on a hoist is needed always refer to the model number and s...

Страница 5: ...4 An equipment warm up procedure is recommended for all start ups and essential at ambient temperatures below 40 4 C Refer to Warm up Procedure listed in the Preventive Maintenance section of this man...

Страница 6: ...the hoist is stopped holding the load in place Top Layer Line Pull Rating The maximum rated line pull in pounds or kilograms on the top layer of cable The maximum rating for any particular hoist is ba...

Страница 7: ...um Layer All wraps of wire rope on the same level between drum flanges Freeboard The amount of drum flange that is exposed radially past the last layer of wire rope Minimum freeboard varies with the r...

Страница 8: ...the load The brake clutch is splined to the shafts between the pri mary and secondary planet carriers It will allow the shaft to turn freely in the direction to raise a load and lock up to force the b...

Страница 9: ...st be clean and free from moisture An airline filter and mist lubricator should be incorpo rated in the air supply line located immediately before the motor The filter should have a moisture trap and...

Страница 10: ...ensure the wedge does not protrude from either end of the pocket causing it to interfere with proper spool ing of wire rope onto the drum see figures 3 4 If there is interference or the wedge does no...

Страница 11: ...4 Wedge pulled too far through anchor pocket Wedge and wire rope fully seated in pocket Drive from this side Wedge not fully seated Wire rope not tight against wedge Wedge may be too large Dead end of...

Страница 12: ...our hoist is operated These instructions are provided in addition to any information furnished by the Original Equipment Manufacturer Equipment operators should be completely familiar with the overall...

Страница 13: ...boom extension Allow the load to stabilize then watch for any signs of downward movement of load or any cable drum rotation The winch static brake should hold the load in place without allowing any d...

Страница 14: ...or will cause accelerated motor wear Moisture traps and air receiv ers in the air system will help minimize moisture in the air reaching the motor 5 The air line lubricator should be replenished as re...

Страница 15: ...de bearings and seals Failure to change gear oil at recommended in tervals may contribute to intermittent brake slippage loss of load control injury or death Refill the hoist with recommended lubrican...

Страница 16: ...n your hoist is correct for your prevailing ambient temperature CAUTION WARNING PREVAILING AMBIENT TEMPERATURE oF 40 30 20 10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 oF AGMA 5 EP ISO VG 220 AGMA...

Страница 17: ...37 B P Energol HL175 Energol HLP65 Esso Nuto H 64 Fanox 38 Regent Regal PE RO Rando A Castrol Hyspin 175 Hyspin 70 Mobil D T E Extra Heavy Almo Oil NO 1 For extreme ambient temperatures consult the l...

Страница 18: ...spected and re placement of all worn cracked corroded or distorted parts such as pins bearings shafts gears brake rotors brake plates drum and base All seals and o rings should be replaced during a te...

Страница 19: ...rate the hoist in both directions for one to two minutes and then take the oil sample from the drain port as soon as possible Do not take the sample from the first oil out the drain port Take a sample...

Страница 20: ...oblem may be improper assembly 4 Band brake is not properly adjusted or is dragging on winch drum Install a gage into the brake release line down stream of the quick exhaust valve and ensure pressure...

Страница 21: ...rake Clutch Service section of this manu al D The winch will not hoist the rated load 1 The winch may be mounted on an uneven or flexible surface which causes distortion of the winch base and binding...

Страница 22: ...h time the load is removed Then when wind ing is resumed the rope has a ten dency to criss cross and overlap on the drum The result is apt to be a flattened and crushed rope 4 The winch may have been...

Страница 23: ...seals and O rings Before reassembly inspect all machined surfaces for excessive wear or damage Lubricate all O rings and the inside surface of oil seals with gear oil or general purpose grease prior t...

Страница 24: ...gear housing 212 therefore the capscrews 220 must be loosened 1 turn at a time alternating across until the springs are no longer compressed Remove the ring gear housing 212 8 Remove the brake intern...

Страница 25: ...25 THIS PAGE INTENTIONALLY LEFT BLANK...

Страница 26: ...26 WINCH CROSS SECTION...

Страница 27: ...14 CAPSCREW 12 102 OUTER BRAKE RACE 1 337 PRIMARY SPACER 1 15 LOCKWASHER 24 103 INNER BRAKE RACE 1 400 OUTPUT PLANET CARRIER ASSY 1 16 PLUG O RING FLUSH 1 104 SPRAG BEARING 2 415 PIN SPIROL 3 17 CABLE...

Страница 28: ...6 o clock position Apply Loctite 242 to the capscrews 219 and torque to 110 5 ft lbs 11 Place the spring spacer 210 and brake springs 203 in the brake cylinder Place the pressure plate 202 on top of...

Страница 29: ...rrosion discoloration material displacement or abnormal wear the bearing should be replaced Likewise the cage should be in spected for unusual wear or deformation particularly the cage bars If there i...

Страница 30: ...o place Always use NEW roll pins When properly positioned 50 of the roll pin will engage the planet gear shaft and 50 will remain in the planet carrier 4 Note that the roll pin is slightly recessed in...

Страница 31: ...g sprag bushing is damaged or shows ex cessive wear there is no need for further disassembly If disassembly is necessary remove the bushing ac cording to the procedure covered in Step No three 3 All b...

Страница 32: ...ion to start it through the sprag clutch If the inner race will not go through the bushings the bushings have probably been damaged and should be replaced 6 Turn the assembly over with the snap ring d...

Страница 33: ...cer 15 and shims 16 6 Remove the bolts 52 holding the output flange on the case The case can be removed 7 Use a punch to drive the crankshaft inwards from the flange plate 24A 8 Remove the outer shaft...

Страница 34: ...rotary valve face to the inside of the gasket Select the correct shim washer from the list 31 34 to obtain the clearance above Rotate the crankshaft until the balance weight is at the bottom dead cen...

Страница 35: ...and adjusting link item 804 to 1 22 1 34 in 31 34 mm 3 Apply brake adjust as needed to allow handle to lock in place with a hard pull 4 Release brake and adjust set screw item 808 to allow the band br...

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