TM 9-4110-258-13
4.33 SHEAVE REPLACEMENT.
This task covers:
a. Removal
b. Installation
INITIAL SETUP
Equipment Conditions
General Safety Instructions:
WARNING
disconnected.
High voltage and exposed rotating parts are
used in the refrigeration unit. Personal injury
can result if power is connected.
a. Removal.
(1) Remove three bolts (1) and install two bolts back into threaded holes in bushing (2). Tighten bolts evenly to
separate bushing from sheave (3). Remove two bolts from bushing.
(2) Loosen two set screws (4) and remove support (5) and flange bearing (6) from fan drive shaft (7).
(3) Slide bushing (2) and sheave (3) off fan drive shaft (7) being careful not to lose keys (8) and (9). Remove keys.
b. Installation.
(1) Install key (9) then slide sheave (3) and bushing (2) onto fan drive shaft (7). Align bushing over key.
(2) Install key (8) then align sheave (3) with key and slide onto bushing (2).
(3) Install support (5) and flange bearing (6) onto fan drive shaft (7).
(4) Install three bolts (1) and tighten evenly to secure sheave (3) to bushing (2).
(5) Tighten two set screws (4) against flat surfaces on fan drive shaft (7).
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