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Pendant Operated Pilot Control Valve Assembly
Valve Shaft
A
(Dwg. MHP1022)
Brake Release Valve Installation and Adjustment:
Refer to Dwgs. MHP2969 in the Product Information Manual and MHP1027
on page 14, A. Sleeve.
NOTICE
•
Valve assembly (341) shaft body is longer on one side of middle groove
than the other. Correct placement of valve assembly is with longer shaft
section located toward bottom of valve body (339). The shorter section will
protrude up, through valve body.
•
To adjust brake release valve, ensure sleeve (338) is loose on shaft (331). If
not loose, back off (turn counterclockwise) setscrew (337).
1. Rotate sleeve (338) to place the longer edge on top. Refer to Dwg. MHP1027
2. Using gentle hand pressure to prevent damage to valve assembly (341) shaft
body, press valve assembly down until ball is in firm contact with sleeve (338).
Sleeve
A
(Dwg. MHP1027)
CAUTION
•
Do not disassemble pilot cap assemblies. Valve cylinder and valve cap are
press fit together. Close fit tolerances cannot be maintained if
disassembled. If repair is required, replacement of the pilot cap assembly
is required.
Pendant Valve Adjustment:
1. Lubricate threads and install capscrews (366) and (368), lockwashers (924),
gasket (340) and pilot cap assembly (367) to valve body (339). Tighten capscrew,
but do not torque.
2. Reaching into exhaust port on valve body (339), grasp shaft (331) and check for
movement in either direction. Any movement requires adjustment.
3. If there is shaft movement, remove pilot cap assembly and back out setscrews
in pistons 1/4 turn. Repeat until there is no movement.
4. When adjustment is complete, tighten capscrews (366) and (368). Refer to
“TORQUE CHART” on page 16 for torque requirements.
Adapter Installation:
1. Place gasket (358) on mating face of adapter (369) and align holes with valve
body (339). Coat threads with Loctite® 242 and, from the bottom side of adapter,
install capscrews (370) into valve body. Refer to
“TORQUE CHART” on page 16 for torque requirements.
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Two Function Pendant Assembly (optional feature)
Refer to Dwg. MHP1677 with emergency stop or MHP2346 without emergency stop.
1. Install ‘O’ rings (443) and (449) along with protector (451) on valves (452). Install
valve assemblies in handle (454).
2. Install levers (453) in pendant handle (454) with pin (447). Stake pin in pendant
handle at both ends to secure.
3. Install screws (448) in levers.
4. Install balls (446) and springs (445) in handle (454). Secure in position with plugs
(444).
5. On pendants with emergency stop, install emergency stop button (441). On
pendants without emergency stop, install plug (470).
6. Install exhaust washer (457) and secure in handle with retainer ring (458).
7. Attach hoses to fittings located on top of pendant handle. Locate hoses to fittings
as shown in Dwg. MHP2398 in Product Information Manual.
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Brake Connection
Refer to Dwg. MHP2239.
Winches without overload valve and/or emergency stop will use configuration 3.
Disc and automatic band brake will require a tee at disc brake port. Contact factory
for replacement.
Winches with an overload valve and/or emergency stop will use configuration 4 and
will require a tee at brake port.
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Winch Guard Assembly (optional feature)
Refer to Dwg. MHP2946.
1. Secure frames (801), (802), (803) and (810) to uprights (42) and (184) with
capscrews (408) and washers (306).
2. Secure lifting lugs (194) to uprights with capscrews (197) and washers (117).
3. Install panels (805) and (807) one at a time, beginning with the lower (805) panel.
4. Install first crossbar (806) with nuts (804).
5. Attach panel to crossbar (806).
6. Hold second panel (805) in place and install second crossbar (806) by sliding
through (hooked) edges of the two panels.
7. Secure crossbar (806) with nuts (804).
8. Continue until all panels are in place.
9. Tighten all fasteners and check winch guard is secure. Ensure wire rope does not
interfere with winch guard during winch operation.
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Drum Locking Pin Assembly (optional feature)
Refer to Dwg. MHP2675.
1. Install new bushing (311) in winch upright (184) if replacement was required.
2. Install shaft (304) in handle (301) and secure with nut (303) and capscrew (302).
3. Install cover (307) on shaft (304) so capscrew holes are aligned with holes in
upright when handle (301) is in a horizontal position.
4. Install housing (308), spring (310), and drum lock pin (312) on shaft (304). Tighten
drum lock pin (312) on thread of shaft (304). Apply a small amount of Loctite®
242 to threads. Refer to “TORQUE CHART” on page 16 for torque requirements.
5. Install drum locking pin assembly in upright and secure with capscrews (305)
and washers (306).
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Press Roller Assembly (optional feature)
Refer to Dwg. MHP2945.
1. If bushings (410) have been removed, replace and install in uprights (42) and
(184), and in both ends of arm (407). Grease bushings (410) for ease of installation.
2. Install center roller (402) in press roller arm (407) and install shaft (411) through
both parts.
3. Install outside rollers (401) and secure with capscrews (408) and washers (409).
Apply a small amount of Loctite® 242 to threads of capscrews.
4. Install springs (405) and (406) so that the shorter end of the springs is toward
the inner portion of the arm (407) where the pins (413) are located.
5. One person positions press roller so the top of arm (407) is curved up toward the
underside of the drum (96), and holds press roller in place while the other person
completes installation.
6. Adjust both springs (405) and (406) so that the long end of springs is on the
inside of siderail (98).
NOTICE
•
Do not engage shorter end of spring behind pins of arm (407) until after
shaft (403) has been installed and secured, and press roller assembly
adjusted to center of drum.
7. Install shaft (403) through hole in leg of upright (42) only.
8. Install one collar (404) on end of shaft (403) between upright and press roller
assembly. Do not tighten collar (404) until steps 11 and 12 have been completed.
9. Install shaft (403) through press roller assembly (400).
10. Install second collar (404) and slide shaft through hole in leg of upright (184).
Ensure that the long end of springs (405) and (406) are still between the siderail
(98) and drum (96). Do not tighten collar (404) until steps 11 and 12 have been
completed.
11. Secure shaft (403) to uprights using capscrews (408) and washers (409). Apply a
small amount of Loctite® 242 to threads of capscrews.
12. Adjust press roller assembly so that it is centered between the drum flanges, and
tighten collars (404).
13. Use extreme caution and pry short end of one spring (405) so that it is positioned
behind the pin (413) of arm (407).
14. Repeat step 13 for spring (406).
NOTICE
•
Use caution when installing springs (405) and (406); springs are under
tension.
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Form MHD56401 Edition 3
