Vestil ACH-100 User Manual
Page 12
BRAKE
The brake is non-adjustable with a nominal 0.004 inch (0.012
mm) air gap and the brake disc must be replaced when the
gap reaches 0.012 inches (0.305 mm). The brake spacer
should be no more than 0.012 inches (0.305 mm) thicker than
the combined thickness of the brake disc and armature plate.
To inspect the air gap, disconnect the hoist from air supply.
Remove the brake end cover (620-533) and brake end
spacer (620-527) from the gear housing (620-113) to expose
the brake. Disconnect the two air tubes from the air cylinder
(620-524). Remove the air cyclinder cap (620-503) and brake
spring (620-123). Remove the air cylinder (620-524) by
removing the 4 screws (620-124). Remove the piston (620-
521), o-ring (620-536), coupling (620-523) and seal (620-535)
by removing screw (620-575). Removing the air cyclinder
assembly will expose the brake armature (620-118), brake
disc (620-117), brake spacer (620-193) and brake base plate
(620-116). Inspect these parts and replace if worn or
damaged. Check o-ring (620-536) and seal (620-535) and
replace these if worn or damaged. Make sure to install new
seal with the opening towards the coupling. Apply grease to
the outside of the lip seal and o-ring. Making sure that the
o-ring (620-536) is on piston shaft, slide the piston (620-521)
into the air cylinder (620-524). Install coupling (620-523) into
air cyclinder (620-524) using screw (620-575).
Assemble the brake base plate (620-116), brake spacer
(620-193), brake disc (620-117) and brake armature (620-
118). Install 4 screw (620-526) into the air cyclinder (620-
524). Install brake spring (620-123) and air cycliner cap (620-
503). Reconnect the two air tubes. Assemble the brake end
spacer (620-527) and end cover (620-533) to gear housing
(620-113) using the three screws (620-507).
Failure to follow proper lockout/tagout procedures may
present the danger of injury from the escape of high
pressure air.
TO AVOID HEALTH INJURY:
Disconnect the hoist from the air supply and
lockout/tagout the main air supply valve before removing
the cover or servicing this hoist.
Air Motor
Once a year, remove the air motor (see Item 9, Page 16) and
check the condition of the bearings, rotor for possible rubbing
on the body or end plates, free movement of the blades in
rotor slots, seals and shims. Replace worn or damaged parts.
If the motor appears to be in good condition, do not service
other than lubricating well with light machine oil.
Pendant Throttle Control
Once a year, disassemble the pendant throttle control (see
page 8) and check the condition of the springs, valves and
levers. Replace worn or damaged parts. If the parts appear
to be in good condition, do not service other than lubricating
well with light machine oil.
Control Valve Assembly
Once a year, disassemble the control valve assembly (see
Exploded View, Pages 13 & 14) and check the condition of
the pistons, springs, spring seats, gasket, O-rings, valve
bolts, air fittings and muffler. Replace worn or damaged
parts. If the parts appear to be in good condition, do not
service other than lubricating them with light machine oil.
PROTECTOR
The Protector™ should operate for the normal life of the hoist
without service. The device has been lubricated and
calibrated and it should not be adjusted. If the Protector™ is
not operating properly (see testing on page 9), it must be
replaced with a properly calibrated unit from the factory.
PREVENTIVE MAINTENANCE
A preventive maintenance program should be established to
prolong the useful life of the hoist and maintain its reliability
and continued safe use. The program should include the
periodic and frequent inspections with particular attention
being paid to the lubrication of the various components using
the recommended lubricants (see page 11).
RECOMMENDED SPARE PARTS
To insure continued service of the ShopAir Hoist, the following
is a list of parts that are recommended to be kept on hand at
all times to replace parts that have worn or failed. Parts
applicable to your hoist should be stocked.
Refer to pages 9-14 for ordering instructions and the Parts
List for part numbers.
7
F
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P
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Na
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Q
Qtty
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Pe
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H
Ho
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H
Ho
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620-117 Brake Disc
1
620-536 Piston Shaft Seal
1
620-512 Piston Return Spring
2
620-540 O-Ring
4
620-514 Piston
2
620-562 Gasket
1
620-515 Valve Gasket
1
620-564 Vane
4
620-531 Pendant Throttle
Control
1
620-570 Oil Seal
1
620-535 Piston Seal
1
620-571 Snap Ring
1
620-576 Motor Repair Kit
1
Figure 10.
(250, 300, 500 & 600 Pound (Double Reeved)
(113, 136, 226 & 272 Kg.)