Paccar BRADEN/GEARMATIC BG8A Installation Maintenance And Service Manual Download Page 1

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BG8A and BG8B

HYDRAULIC WINCH

INSTALLATION, MAINTENANCE,

AND SERVICE MANUAL

LIT2204 Rev 7
February 2017
Printe d in USA

BG8A
BG8B

Visit our Web site at www.paccarwinch.com for the most comprehensive 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
year manufactured

For serial number location, see page 1

Summary of Contents for BRADEN/GEARMATIC BG8A

Page 1: ...ts reserved BG8A BG8B Visit our Web site at www paccarwinch com for the most comprehensive collection of winch hoist and drive information on the Internet Most publications and specification sheets ar...

Page 2: ...m to 4 30 p m CST Provide the complete winch model and serial number when making inquiries The model and serial numbers are stamped into the base to the left of the hydraulic motor PARTS AND SERVICE B...

Page 3: ...27 Reversing Direction of Drum Rotation 29 Recommended Fastener Torque 30 TABLE OF CONTENTS CAUTION This emblem is used to warn against potential or unsafe practices which COULD result in personal in...

Page 4: ...ntended for use or application to equipment used in the lifting or moving of persons 12 Do not exceed the maximum pressure or flow stated in the winch specifications 13 Operate winch line speeds to ma...

Page 5: ...oil out of the motor when the control valve is placed in neutral When the control valve is placed in the pay out posi tion the spool valve remains closed until sufficient pilot pressure is applied to...

Page 6: ...otor will cause the pressure to rise and the opening in the brake valve to enlarge speeding up the descent of the load Decreasing this flow causes the pressure to lower and the opening in the brake va...

Page 7: ...he centerline in all positions If necessary reposition bearing support and vent plug as follows A Remove bearing support bolts B Rotate bearing support until vent plug is positioned correctly and bolt...

Page 8: ...changes in temperature Maximum cold weather start up viscosity should not exceed 5000 SUS with a pour point at least 20 F 7 C lower than the minimum temperature Under continuous operating conditions...

Page 9: ...pe off the drum as possible until you reach the last five wraps Apply a one ton weight to the hook and slowly reel in the wire rope while an assistant monitors the cable spooling at a safe distance fr...

Page 10: ...ll a short piece of 1 inch pipe into the threaded drum port to prevent oil from draining onto winch base Insert a wrench through the 1 inch pipe and remove the drain plug Install plug securely after o...

Page 11: ...property damage severe personal injury or death 071 MOTOR The brake valve cartridge may be unique in that turning the adjusting screw in clockwise lowers the release pressure If it is determined a bra...

Page 12: ...he pilot orifice tightly in the brake valve Check brake cylinder seal as follows A Disconnect the swivel tee from the brake release port Connect a hand pump with accurate 0 2000 PSI gauge and shut off...

Page 13: ...ist the rated load and cause heat 2 System relief valve may be set too low Relief valve needs adjustment or repair 3 Be certain hydraulic system tem perature is not more than 180 F Excessive hydraulic...

Page 14: ...xcessive hydraulic oil temperatures may be caused by A Plugged heat exchanger B Too low or too high oil level in hydraulic reservoir C Same as D2 D Hydraulic pump not operating effi ciently 3 Excessiv...

Page 15: ...he wrong lay rope There is a distinct advantage 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 eve...

Page 16: ...s determined to be in the winch use the fol lowing procedure to disassemble the winch 1 Remove the wire rope from the winch drum and align the drain hole in the drum with a hole in the support side pl...

Page 17: ...NOTE 23 1 gear ratio winches have a sun gear adapter in addition to the sun gear shaft 10 Remove the primary planet carrier from the drum Refer to Planet Carrier Service for additional infor mation 11...

Page 18: ...cularly the cage bars If there is any damage that will impair the cage s ability to sepa rate retain and guide the rollers properly the bear ing should be replaced The thrust washer contact areas shou...

Page 19: ...hole so the pin will not back out Repeat these steps for each of the three planet gears PRIMARY PLANET CARRIER 1 To service the primary planet carrier the steps are the same as for the output carrier...

Page 20: ...ke separator plates and motor sup port Note groove on outside diameter of motor support Although most illustrations in this section show splined discs all procedures are the same except where spe cifi...

Page 21: ...dis torted or heat discolored 5 Check brake spring free length minimum free length is Check springs for any sign of cracking or failure If a brake spring must be replaced for any reason then ALL brake...

Page 22: ...e on top of brake spacer Hold pressure plate down firmly by hand and measure clearance in three places between motor support and pressure plate Average gap must measure between 153 inch 3 99 mm maximu...

Page 23: ...capscrews and tighten evenly to recommended torque BRAKE CYLINDER PRESSURE TEST 1 Install the 4 JIC fitting into the brake release port Connect a hand pump with accurate 0 2000 PSI 0 13 800 kPa gauge...

Page 24: ...no need for further disassembly If disassembly is necessary remove the bushing according to the procedure covered in Step 3 All brake clutch assembly parts should be thoroughly cleaned and inspected...

Page 25: ...to start it through the sprag clutch If the inner race will not go through the bushings the bushings have probably been dam aged and should be replaced 6 Turn the assembly over with the snap ring down...

Page 26: ...t planet carrier into the drum while meshing the planet gears with the ring gear and the planet housing with the bearing support 8 Install the primary sun gear and thrust washer into the primary plane...

Page 27: ...the clutch apply 750 1000 PSI 5170 6900 kPa to the brake release port with a hand pump The brake discs will move freely with the brake released permitting alignment of the discs brake clutch and input...

Page 28: ...he brake release BR port using a 5 32 inch Allen wrench 2 Remove the elbow fitting motor drain check ball and spring 3 Remove the spool spring retainer and spool spring Check spring free length Replac...

Page 29: ...to be certain they are open ASSEMBLY 1 Install new O rings on the plug and spring retainers 2 Install new O rings and backup rings on the spool and damper piston as shown It is important that each bac...

Page 30: ...rain port 7 If your winch had the brake release hose connected directly to the motor the original motor port must be plugged and the hose connected to the motor pres sure port near the manifold block...

Page 31: ...epending upon product used 30 9 Before returning the winch to full service a light load should be lifted and held a few feet off the ground to be sure the static brake is functioning properly The winc...

Page 32: ...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 PS...

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