Ingersoll-Rand MHP3238, Информация по техническому обслуживанию продукции

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4. Do not disassemble this Hoist unless you have a complete set of new gaskets,
O-rings and seals on hand for replacement. These are available in Overhaul
Gasket Kit
5. Do not attempt to wash sealed bearings.
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Disassembly of Valve Chest
Refer to Dwgs. MHP3238, MHP3241, and MHP3245.
1. If the Hoist has a pendant control, disconnect the three pendant hoses (211)
from the elbow and adapters (221 and 222) by loosening the swivel fitting (212).
2. Remove the pendant links (223).
3. Unscrew the valve chest screws (44 and 45) and remove the valve chest (14) and
valve chest gaskets (43).
4. Unscrew and remove the swivel inlet assembly. Push the inlet nipple (39) out of
the inlet body (38) to expose the swivel inlet seals (40).
5. Unscrew the valve chest cover screws (37) and remove the valve chest cover (33)
and valve chest cover gasket (31).
6. Remove the piston and piston shaft assemblies (26 and 28) and piston springs
(25).
7. Remove the valve seat lock screws (23).
8. While exerting pressure against the valve seats (20), use retaining ring pliers to
remove the valve seat retainers (24).
9. Using a hooked tool, pull the valve seats from the valve chest or tap the bottom
of the valve chest on a block of wood.
10. Remove the two valve assemblies (15 and 17) and valve springs (19) from the
valve chest.
11. If the piston shaft seals (29) require replacement, press the piston retaining pins
(30) from each piston and shaft and slide the pistons off the shafts.
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Disassembly of the Brake Mechanism
Refer to Dwg. MHP3243.
1. Unscrew the four shoulder bolts (105) and remove the assembled spring and
piston housing (96).
2. If you are going to disassemble the spring and piston housing, proceed as
follows:
a. Remove the plate screws (104) and the plate (103).
b. Place the assembly, pressure plate (98) downward, on an arbor press or place
the assembly vertically in a vise.
c. While holding the housing against the compression of the springs (97), hold
the pressure plate screw (98A) with a wrench and unscrew the piston nut
(98B).
d. Ease up on the arbor press slowly and carefully.
3. Pull off the pressure plate and push the piston (99) from the housing.
4. Withdraw the brake plates (94) and brake discs (95).
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Disassembly of the Motor
Refer to Dwg. MHP3240.
1. Remove the entire brake mechanism. Refer to disassembly of the brake
mechanism.
2. Remove the brake driver retainer (93) and withdraw the brake driver (92).
3. Remove the assembled valve chest (14). Refer to disassembly of the valve chest.
4. Remove the limit actuator retaining pin (52) and withdraw the limit actuator (51).
5. Unscrew the valve chest plate screws (48) and remove the valve chest plate (46).
6. Grasp the rear end plate (67) and pull the entire assembled motor from the Hoist.
If the motor is a little “sticky”, tap on the brake end of the motor shaft (64) with
a soft drift.
NOTICE
• If the cylinder dowel (71) separates from the assembled motor, insert a long
pin in the dowel pin hole to align the front end plate (72) during removal.
7. Grasp the motor shaft vertically in copper-covered vise jaws.
8. Remove the motor shaft rear retaining ring (65).
9. Lift off the rear end plate (67) and bearing (66), cylinder (70) cylinder dowel (71),
vanes (69), springs (69A), rotor (68), front end plate (72) and bearing (73).
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Disassembly of the Gearing
Refer to Dwgs. MHP3242, and MHP3259.
1. Remove the entire brake mechanism. Refer to disassembly of the brake
mechanism.
2. Remove the brake driver retainer (93) and withdraw the brake driver (92).
3. Withdraw the brake tube (57).
4. Grasp the brake housing (90) and pull it away from the housing (1) just far enough
to expose the two cutout areas at the rear of the housing. Rotate the brake
housing until the large diameter of each planet gear (82) is aligned with a cutout
area. Withdraw the brake housing, ring gear (88) and planet gear frame assembly
as a unit.
5. Remove the ring gear gasket (89).
6. Pull the brake housing (90) from the gear frame bearing (86). If it is a little “sticky”,
lightly tap on the rear of the planet gear frame (81) with a plastic hammer to
loosen it.
7. Pull the ring gear (88) from the brake housing, if required.
8. Using a bearing puller, remove the gear frame bearing (86).
9. Remove the planet gear shafts (85) by pressing them toward the short hub end
of the planet gear frame (81).
10. Do not remove the needle bearings (83 or 87) from the planet gears (82) or planet
gear Frame unless you have new bearings on hand for installation. A needle
bearing is always damaged during the removal process.
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Disassembly of the Throttle Lever and Chain Guide
Refer to Dwgs. MHP3238, and MHP3259.
1. Drive out the limit actuator retaining pin (52) and remove the limit actuator (51).
2. Drive out the throttle lever retaining pin (54).
3. Grasp the square end of the throttle shaft (50) and withdraw it from the Hoist.
4. Unscrew the chain guide screws (11) and remove the chain guide (10).
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Disassembly of the Chain Wheel and Chain Guard
Refer to Dwgs. MHP3239, and MHP3259.
1. Remove the brake mechanism. Refer to disassembly of the brake mechanism.
2. Remove the valve chest. Refer to disassembly of the valve chest.
3. Remove the motor. Refer to disassembly of the motor.
4. Remove the gearing. Refer to disassembly of the gearing.
5. Remove the throttle lever and chain guide. Refer to disassembly of the throttle
lever and chain guide.
6. Using a soft drift, lightly tap the motor end of the chain wheel (76) to drive it out
through the brake end of the Housing.
7. Use a bearing puller to remove the chain wheel bearings (77 and 79).
8. Remove the chain guard retaining screws (13A) and remove the chain guard
(13).
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Cleaning, Inspection and Repair
Use the following procedures to clean, inspect, and repair the components of the
hoist.
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Cleaning
CAUTION
• Bearings that are loose, worn or rotate in the housing must be replaced.
Failure to observe this precaution will result in additional component
damage. Do not use tri-chloroethylene to clean parts.
Clean all hoist component parts in solvent (except for the brake discs). The use of a
stiff bristle brush will facilitate the removal of accumulated dirt and sediments on
the gears and frames. If bushings have been removed it may be necessary to carefully
scrape old Loctite® from the bearing bores. Dry each part using low pressure, filtered
compressed air.
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Inspection
All disassembled parts should be inspected to determine their fitness for continued
use. Pay particular attention to the following:
1. Inspect all gears for worn, cracked, or broken teeth.
2. Inspect all bushings for wear, scoring, or galling.
3. Inspect shafts for ridges caused by wear. If ridges caused by wear are apparent
on shafts, replace the shaft.
4. Inspect all threaded items and replace those having damaged threads.
5. Measure the thickness of the brake discs (95). If the brake discs are less than 0.090
in. (2.29 mm) replace the brake discs (95).
6. Check mufflers (49) for damage or excessive dirt.
7. Check bearings for freeness of rotation and wear. Replace bearings if rotation is
rough or bearings are excessively worn.
8. Inspect brake driver bearing wear area on brake driver (92) and in planet gear
frame (81) for ridges or galling. If either condition exists replace parts.
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Assembly
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General Instructions
1. The MLK Hoist is constructed of various modules. The following instructions will
first describe how to assemble the individual modules and finally, how to
assemble a complete hoist from the assembled modules.
2. Always press on the inner ring of a ball-type bearing when installing the bearing
on a shaft.
3. Always press on the outer ring of a ball-type bearing when pressing the bearing
in a bearing recess.
4. Always press against the stamped end of a needle-type bearing when installing
the bearing in a bearing recess.
5. Whenever grasping a part in a vise, always use leather-covered or copper-
covered vise jaws to protect the surface of the part and help prevent distortion.
This is particularly true of threaded members and housings.
6. Always clean and wipe every part (except the brake parts) with a thin film of oil
before installation.
7. Never wash sealed bearings in solvent or any other cleaner.
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Assembly of the Chain Wheel and Chain Guard
Refer to Dwgs. MHP3239, and MHP3259.
1. Place the Chain Guard (13) in position, and install the two chain guard screws
(13A) and lockwashers (13B) at 9.5 - 10.8 Nm (7-8 ft-lbs) torque.
2. Place the chain wheel plain end washer (78) on the plain or short hub of the
chain wheel (76).
3. Press the chain wheel plain end bearing (77) on the plain or short hub of the
chain wheel until it contacts the chain wheel plain end washer.
4. Slide the chain wheel splined end washer (80) over the splined hub of the chain
wheel.
5. Press the chain wheel splined end bearing (79) on the splined hub of the chain
wheel until it contacts the washer.
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Assembly of the Planet Gear Frame
Refer to Dwgs. MHP3242, and MHP3259.
1. Press a new planet gear bearing (83) into each end of the planet gears (82). Seat
each bearing 1/64 in. (0.5 mm) below the face of the gear.
2. Work a liberal amount of Ingersoll Rand No. 11 Grease into the bore of the planet
gear bearings, making certain that each of the individual needles or rollers are
covered.
3. Stand the planet gear frame (81) on the table of an arbor press with its short hub
upward.
8 Form 47099007 Edition 3