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SECTION VII
DISASSEMBLY AND REASSEMBLY
7-1. GENERAL.
a. The following disassembly and reassembly instructions
apply to all models of BUDGIT Air Hoists. Where needed,
variations to instructions are provided to cover differences
between models (suspensions, controls, load chain, capacity
sizes) with applicable models specifically noted.
b. A complete tear down procedure is given. However, if only
certain parts require repair or replacement, a partial teardown
may be performed, using applicable portions of the instructions.
c. For easier handling during disassembly, the following
disassembly steps may, where conditions permit, be completed
before hoist is removed from its overhead suspension or
disconnected from its air supply: Remove chain container, if
hoist is so equipped. Remove lower block and load chain
assembly, following procedure outlined in paragraph 7-2.b.
d. These hoists contain precision machined parts and should
be handled with care at disassembly and reassembly. When
removing or installing parts with press fits, be careful to apply
pressure evenly. On ball bearings, apply pressure to face of
inner or outer race, whichever is adjacent to mating part. This
will avoid damage to bearing races from brinelling by pressing
through bearing balls. Apply a thin film of oil to parts having a
tight fit when installed.
7-2. DISASSEMBLY.
a. Removal of Hoist from Overhead Suspension.
(1) Turn off air at source.
(2) Operate control to bleed air from hoist.
(3) Disconnect air hose at inlet swivel.
(4) Remove hoist from overhead suspension.
b. Removal of Lower Block and Load Chain Assembly.
(1) On models with single reeved load chains (1/4, 3/8 and
1/2 ton), disconnect end of load chain from tail end anchor
boss at side of hoist frame. Remove chain anchor by prying
off spring clip and remove connecting link, attaching chain to
anchor boss on roller chain models (Figure 7-1). Remove
socket head cap screw, holding end link to tail end anchor on
coil chain models. If hoist is connected to air service, run chain
out of hoist by operating control in “lowering” direction. If hoist
is not connected to air service, the chain can be pulled out of
hoist by hand while holding brake open by pulling down on
control lever.
(2) On models with double reeved chains (3/4 and 1 ton),
disconnect end of chain as in paragraph (1) above, run chain
out of hoist by operating it in “lowering” direction, and disconnect
opposite end of chain from anchor at side of upper suspension
bracket.
(3) On single reeved 1/4, 3/8 and 1/2 ton models, separate
load chain (coil or roller type) from lower block assembly. Drive
out small spring pin securing lower block pin in lower block
and push out lower block pin to release chain. On roller chain
models, an adapter is used to attach chain to lower block. This
adapter is removed from end of chain by first driving out small
spring pin and then pushing out adapter pin.
(4) Lower blocks (1/4, 3/8 and 1/2 ton) are of a pinned
construction, permitting individual replacement of body, thrust
bearing, or hook. To disassemble, drive spring pin from hook
nut. With pin removed, hold hook nut from turning with drift
punch and rotate hook to unscrew it from nut. Separate hook,
bearing shield, needle bearing and two thrust washers from
body. Hook and nut are drilled at assembly and are replaced
only as an assembly.
(5) On 3/4 and 1 ton (double reeved) models, the lower
block assembly is disassembled by removing socket head
screws and nuts holding body halves together.
c. Removal of Brake Cover, Control Lever and Load Brake.
(1) On pendant throttle control models, for convenience,
disconnect control hoses from air cylinders, open strain cable
“S” hook at eye bolt on throttle housing and remove pendant
throttle control assembly from hoist. Refer to paragraph 7-6
for disassembly and reassembly of pendant throttle control.
(2) Remove two screws securing brake housing cover to
frame and lift off cover.
(3) To remove control lever and shaft, drive spring pins from
control lever (Figure 7-2) and valve shifter at end of shaft
using a drift punch. Lightly tap valve shifter end of shaft and
withdraw shaft by pulling on brake cam end (Figure 7-3). As
shaft is withdrawn, valve shifter and control lever will fall free.
Figure 7-1. Removing Connecting Link at Tail End
of Load Chain (Roller Chain Models).
10947A
