Pullmaster H25 - Reassembly of Brake Housing Assembly

PAGE 17
fasten internal gear onto connecting shaft using circlip, item 431.
7) Reassemble primary planet hub assembly. Use grease to temporarily hold 20 loose rollers, item 423, in the
bore of the planet gear, item 420. Verify placement of sungear stopper, item 444. Position thrust washers,
item 421, on either side of the planet gear and press planet pin, item 410, into the final planet hub, item 400.
Retain with circlip, item 411.
8) Insert primary sungear, item 440, between three planet gears and insert sungear shaft into connecting shaft,
engaging planet gears with internal gear. Fasten with retaining ring, item 401.
9) Insert final sungear, item 340, into cable drum and engage three planet gears, item 320.
10) Lower brake housing assembly onto cable drum, while engaging spline of final sungear with primary planet
hub, item 400. Line up mounting holes of bearing flange, item 530, with those in the cable drum.
11) Rotate brake housing to line up access holes and fasten bearing flange using six capscrews, item 537, and
lockwashers, item 541.
12) Install new, well-greased O-ring, item 735, into access plug, item 734. Install access plug into access hole
inside brake housing.
13) Attach base halves, item 550 and item 552, using 28 capscrews, item 551, and lockwashers, item 553.
REASSEMBLY OF BRAKE HOUSING ASSEMBLY:
Reassemble brake housing assembly as follows:
1) Install brake spacer, item 712, into brake housing.
INCORRECT ASSEMBLY OF THE FRICTION PLATE AND DIVIDER PLATE
STACK WILL REDUCE BRAKING CAPACITY AND ALLOW THE LOAD
TO DROP, CAUSING PROPERTY DAMAGE, SEVERE INJURY OR
DEATH. REASSEMBLE PER INSTRUCTIONS.
2) Starting and finishing with a divider plate, alternately install 13 divider plates, item 713, and 12 friction plates,
item 715.
3) Liberally grease O-ring, item 751, and O-ring, item 753, and install on the brake piston, item 750.
4) Slide the brake piston into the brake housing with the holes for the brake springs facing out of the brake
housing assembly.
5) Install sprag clutch, item 723, and sprag clutch aligner, item 724, into the bore of connecting shaft, item 600.
6) Carefully slide motor drive shaft, item 730, into the connecting shaft until it engages the spline of the primary
sungear, item 440, and circlip, item 727, is tight against the sprag clutch aligner.
IMPORTANT: For proper brake function, verify that the sprag clutch is installed correctly. When
viewed from the motor end, the motor drive shaft of a clockwise hoisting winch
must turn freely clockwise and lock in the counterclockwise direction.
7) Install 18 brake springs, item 752, in the brake piston. The brake piston has 20 holes and the two empty holes
should be opposite each other.
8) Liberally grease three new O-rings, item 801, and install into the recesses on the motor adaptor, item 800.
Install new, well-greased O-ring, item 707, on the flange of the motor adaptor.
251 REV.970601
SERVICE INSTRUCTIONS CONTINUED
DANGER