Harrington Hoists and Cranes MCR Trolley - Manual (Page 19)

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3.4 Air Connections
3.4.1
CAUTION
Ensure that the air supply pressure and volume is proper for the hoist or trolley.
3.4.2
DANGER
Before proceeding, ensure that the air supply for the hoist or trolley has been de-
energized (disconnected). Lock out and tag out in accordance with ANSI Z244.1 “Personnel Protection
-Lockout/Tagout of Energy Sources”.
3.4.3 This instruction applies to installations where a TCR model air hoist is installed on an MCR trolley. In
this case the hoist and trolley are controlled by a pendant with four push buttons – two for the hoist
motion and two for the trolley motion. Special air hose considerations must be taken if the trolley is
used with a hoist other than a TCR model.
Trolley to Hoist Air Hose Connection – The Trolley Hoist Air Hose connects directly to the air fittings
on the trolley and on the hoist. Make these connections as follows:
1) Refer to Figure 3-9 .
2) Insert one end of the air hose into the trolley air fitting until fully seated. Tighten the hose clamp.
3) Insert the other end of the air hose into the hoist air fitting until fully seated. Tighten the hose
clamp.
Pendant Assembly Connection – The Pendant Assembly connects to the trolley via 3 air tubes and
to the hoist via 2 air tubes. Make these connections as follows:
1) Refer to Figure 3-9 .
2) Attach the pendant assembly to the hoist by attaching the under cover bracket to the hoist with
screws.
3) Attach the pendant assembly strain relief to the mounting screw on the hoist.
4) Insert the pendant assembly color-coded air tubes into the proper fittings on the trolley and the
hoist. Insure that the tubing is fully seated in the fitting.