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SERVICE INSTRUCTIONS
CONTINUED
338 REV.031001
13) Starting and finishing with divider plate, alternately install 13 divider plates item 714, and 12 friction plates
item 715.
14) Install two sprag clutches item 723, onto motor drive shaft item 730. Slide sprag clutch aligner, and support
washer item 717, onto motor drive shaft and fasten with circlip item 727.
IMPORTANT:
For proper brake function, verify that sprag clutches are installed correctly. Motor drive shaft
should turn freely in clockwise rotation and lock up in counterclockwise rotation (for standard
rotation).
15) Carefully install motor drive shaft assembly into center bore of connecting shaft item 600, engaging spline
in primary sungear item 440, until flange of sprag clutch aligner comes into contact with connecting shaft.
16) Slide ball bearing item 609, with bearing carrier item 610, onto connecting shaft item 600.
17) Use grease to temporarily hold new O-ring item 801, into recess on flange of motor adaptor item 800. Install
new, well-greased O-ring item 707, onto motor adaptor pilot.
18) Position motor adaptor item 800, at brake housing, aligning brake release pressure transfer holes of motor
adaptor and brake housing. Tighten 12 capscrews item 821, with lockwashers item 823, one turn at a time,
to evenly compress springs.
REASSEMBLY OF HYDRAULIC MOTOR:
If hydraulic motor was disassembled, proceed with reassembly as follows:
1) Clean all parts thoroughly before reassembly and apply grease liberally to all seals. Use only new seals (seal
kit Part No. 23121) for hydraulic motor.
2) Install six new pocket seals item 887, on each thrust plate item 885. Seal kit includes a single strip of rubber.
Using a sharp knife, cut lengths to fit openings in thrust plates. Press one thrust plate, together with six pocket
seals, onto bearings item 875, installed in motor adaptor item 800, so pocket seals are against motor adaptor.
3) Install new, well-greased body seal item 869, on each side of gear housing item 861. Slide gear housing
together with body seals, onto motor adaptor, lined up on two dowel pins. Tap on tight using soft-headed
hammer.
4) Install gear set item 881, in gear housing (longer gear with internal spline goes into top position).
5) Press other thrust plate item 885, complete with six new pocket seals item 887, onto bearings installed in port
end cover item 870, so pocket seals are facing port end cover.
6) Install port end cover item 870, together with two bearings item 875, and new ring seal item 877, onto gear
housing, lined up on two dowel pins item 865. Tap on tight using a soft-headed hammer. Install and lightly
torque four hex capscrews item 951, and lockwashers item 953, to approximately 50 ft-lb (70 Nm).
7) Plumb Planematic assembly to hydraulic supply and torque motor capscrews according to following procedure:
-
Ensure that circulation supply flow is being supplied to and vented from brake housing. If an
internal circulation model, fill with hydraulic oil through one of three filler / drain ports
before running.
-
Run Planematic drive in hoisting direction, with no load, at reduced speed (approximately
30% of maximum hydraulic volume).
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With Planematic drive running, evenly tighten four capscrews item 951, to 200 ft-lb (271 Nm)
-
Test motor operation by running Planematic drive at full speed in both directions.
