
Form MHD56358 Edition 1 9
Reduction Gear Assembly
NOTICE
• It is important to maintain a clean work area when reduction assemblies are
reassembled. During reassembly clean each part thoroughly and lightly coat
with appropriate lubricant as described in ‘Recommended Lubricants’ in the
“LUBRICATION” section of the Product Information Manual.
Refer to Dwg. MHP2850.
1. Install bearing (49) and retainer ring (50) in gear carrier (47).
2. Lubricate and install ‘O’ rings (51) on ring gear (53).
3. Align capscrew holes and dowel pins with gear carrier (47) and install ring gear
(53). Ensure ‘O’ rings are not damaged during installation.
4. Install planetary assembly (54).
5. Install thrust bearing (55) into sun gear (56).
6. Install retainer ring (57) on sun gear and locate in planetary assembly (54).
7. Align capscrew and dowel holes and install input housing (59). Apply a light
coating of Loctite® 262 to capscrew (60) threads and install by hand. Equally
tighten capscrews in a diametrically opposed pattern to allow for equal
compression of housing onto ring gear (53) and gear carrier (47). When ring gear
and input housing flanges are flush with gear carrier, torque capscrews to 95 ft
lbs (128 Nm).
8. Install dowel pins (52) and tap into position until slightly below input housing
flange.
9. Install planetary assembly (58) onto sun gear (56).
10. Lubricate and install ‘O’ rings (62) on ring gear (63).
11. Install dowel pins (70) in ring gear (63) so they extend an equal distance on
both sides of ring gear.
12. Align capscrew holes and dowel pins and install ring gear (63) on input housing
(59). Using a soft hammer or mallet, carefully tap dowel pins and ring gear (63)
onto input housing until mating flanges are flush. Ensure ‘O’ rings are not
damaged during installation.
13. Place thrust bearing (55) in sun gear (66) and install sun gear into planetary
assembly (58).
14. Install planetary assembly (67) onto sun gear (66).
15. Align capscrew holes and dowel pins and install spacer (71) onto ring gear (63).
Using a soft hammer or mallet, carefully tap spacer onto ring gear until mating
flanges are flush. Ensure ‘O’ rings are not damaged during installation.
16. Lubricate and install ‘O’ rings (62) on ring gear (72).
17. Using a soft hammer or mallet, carefully tap ring gear (72) onto spacer (71).
Ensure ‘O’ rings are not damaged during installation.
18. Install sun gear (69) in planetary assembly (67).
19. Align capscrew and dowel holes and install cover (73). Use a soft hammer or
mallet to carefully tap the cover until flush with ring gear (72). Apply a light
coating of Loctite® 242 to capscrew (75) threads and install by hand. Equally
tighten the capscrews in a diametrically opposed pattern to allow for equal
compression of cover onto ring gear (72) and spacer (71). When cover, ring gear,
and spacer flanges are flush, torque capscrews to 32 ft lbs (42 Nm).
20. Install dowel pins (74) and tap into position until slightly below cover flange.
21. Place a bead of Loctite® 515 sealant on surface that mates with gear carrier.
Sealant location should be inside bolt pattern.
22. Align capscrew and dowel holes and install reduction gear assembly into drum
(80). Apply a light coating of Loctite® 242 to capscrew (45) threads and install
capscrews and lockwashers (46). Torque capscrews to 255 ft lbs (346 Nm).
23. Install two dowel pins (86) and tap into position until slightly below gear carrier
flange.
24. Apply thin coat of Loctite® 609 to outside of seal (43) and, with seal lip facing
out, install in gear carrier (47).
Drum Assembly
Refer to Dwg. MHP2850.
Refer to “Winch Assembly” for assembly of inboard upright (42) and drum shaft (41).
1. Stand drum (80) in an upright position. Align splines and carefully lower inboard
upright and drum shaft assembly onto drum (80).
2. Using a ‘C’ clamp, secure inboard flange assembly to drum flange and set
complete assembly in a horizontal position.
3. Clean surface, pack bearing (87) with grease and install in outboard upright
(84).
4. Install outboard upright (84) on drum end. Ensure assembly is kept centered on
journal during this step.
5. Install bearing retainer (92). Secure by installing two capscrews (94). Lightly
coat capscrew threads with Loctite® 242. Torque to 30 ft lbs (41 Nm).
6. Apply a light coat of Loctite® 515 sealant to mating surface of outboard upright
(84) and install end cover (95). Secure using four capscrews (97) and
lockwashers (96). Lightly coat capscrew threads with Loctite® 242. Torque to 30
ft lbs (41 Nm).
7. Install siderails (82) to uprights (42) and (84) and loosely secure using
capscrews (85) and lockwashers (98).
8. Tap dowel pins (86) into position until flush with siderails.
9. Tighten eight capscrews (85) evenly. Torque to 140 ft lbs (190 Nm).
10. If lifting lugs (83) have been removed, attach with capscrews (90) and washers
(98) to upright(s) (42) and (84).
Manual or Automatic Brake Assembly
Refer to Dwg. MHP2852.
1. Install pivot bracket (122) on the end of arm (124) with pin (121) and cotter pin
(102). Recessed side of threaded hole must be toward the band side.
2. Install connecting link (125) on arm (124) and secure in position with pin
(121), washer (98) and cotter pin (102). Assemble connecting link (125) so
curved surface matches contour of brake band.
3. Install halves of brake band (128) to connecting link (125) and secure with pins
(101), (121), washers (98) and cotter pins (102).
4. Lift winch assembly, with a suitable hoist, approximately 6 inches (15 cm) off
the floor or work bench.
5. Position brake band sub-assembly around brake diameter on drum (80) so arm
(124) lays at the bottom. When band is positioned, lower winch.
6. Manual band brake: Mount pivot bracket (122) on inside surface of siderail (82)
and secure in position with capscrews (116) and lockwashers (117).
7. Automatic band brake: Mount pivot bracket (122) on inside surface of siderail
(82). Position spacer (107) and bracket (118) on outside surface of siderail.
Secure all pieces in position with capscrews (116) and lockwashers (117).
8. Screw link stud (103) into handle (105) and install handle in lug on end of brake
band (128). Lubricate pivot points being careful not to get grease on brake band
lining.
9. Pull brake band halves together and install pin (101) through lug on band (128)
and adjusting screw (103) of handle assembly.
10. Install stop plate (126) on inside of siderail (82) with capscrews (119) and
lockwashers (117). Install adjusting screw (127) and locknut (120) through
siderail (82) and stop plate (126) until it contacts arm (124).
11. Automatic band brake: Install hydraulic cylinder (110) so it connects with
bracket (118) and brake lever (105). Use pins (106), (134) and cotter pins (102)
to secure in position.
12. Adjust brake as described at the start of the “MAINTENANCE” section.
Press Roller Assembly (optional feature)
Refer to Dwgs. MHP2695.
Two people are recommended when installing press roller assembly.
1. If bushings (410) have been removed, replace and install in uprights (42) and
(84) and in both ends of arm (407). Grease bushings (410) for ease of
installation.
2. Install rollers (402) on smaller ends of press roller arm (407) and secure with
capscrews (408) and washers (409). Apply a small amount of Loctite® 242 to
threads of capscrews.
3. Install springs (405) and (406) so shorter end of springs are toward tabs on
inner portion of arm (407).
4. Position press roller so top of arm (407) is curved up toward the under side of
drum (80). One person must hold press roller in place while the other person
completes installation.
5. Adjust both springs (405) and (406) so long end of springs are on inside of
siderail (82).
NOTICE
• Do not engage shorter end of spring behind tabs of arm (407) until after
shaft (403) has been installed and secured and press roller assembly is
adjusted to center of drum.
6. Install shaft (403) through hole in leg of upright (84) only.
7. Install one collar (404) on end of shaft (403) between upright and press roller
assembly. Do not tighten collar (404) until steps 10 and 11 have been
completed.
8. Install shaft (403) through press roller assembly (400).
9. Install second collar (404) and slide shaft through hole in leg of upright (42).
Ensure that long end of springs (405) and (406) are still between siderail (82)
and drum (80). Do not tighten collar (404) until steps 10 and 11 have been
completed.
10. Secure shaft (403) to uprights using capscrews (408) and washers (409). Apply a
small amount of Loctite® 242 to threads of capscrews.
11. Adjust press roller assembly so it is centered between the drum flanges and
collars (404).
12. Tighten collars (404).
13. Using extreme caution, pry short end of one spring (405) so it is positioned
behind the tab of arm (407).
14. Repeat step 13 for spring (406).
CAUTION
• Use caution when installing springs (405) and (406). Springs are under
tension.
Winch Assembly
Refer to Dwg. MHP2850 and MHP2859.
1. Clean both mating surfaces on inboard upright (42) and install drum shaft (41)
through bore aligning dowel pin holes.
2. Install dowel pins (40) flush or slightly below surface of drum shaft (41).
3. Install eight capscrews (39). Lightly coat capscrew threads with Loctite® 242
and torque to 80 ft lbs (108 Nm).
4. Press bearing (37) onto drive shaft (35). Lightly coat inner bearing race bore
with Loctite® 609. Install retainer ring (38).
5. Install shaft and bearing into drum shaft (41) so smaller splined end enters first.
Install retainer ring (36) in bore of drum shaft (41).
6. Lubricate and install ‘O’ ring (33) on hub of drum shaft (41).
7. Install studs (7) in brake adapter (6), using Loctite® 242, if they were removed.
8. Install brake adapter (6) on drum shaft (41) being careful not to damage ‘O’ ring
(33). Secure in position with capscrews (4) using Loctite® 242.