Spark-Resistant Hoist Section - Ingersoll-Rand 7700-E Series Installation, Operation And Maintenance Instructions

Spark-Resistant Hoist Section

Models Hook
Capacity (lbs)
Mounting
7712EL 550
7714EL 1500
* Note: Order in FT.
The hoists listed in the chart above are furnished with load chain made of zinc plated alloy steel. The top and
bottom hooks of these hoists are bronze, with snaps.
The 550 lb. capacity, hoists have a rate of lift of 50 feet per minute and 70 feet per minute on descent. The 1500 lb.
capacity hoists have a rate of lift and descent at approximately 16 feet per minute.
SPECIAL NOTE: Spark-resistant models are shipped from the factory with valves (41595) preset for maximum rates
of lift and descent and are secured by set screws (41627-1). DO NOT ADJUST OR REMOVE VALVES (41595) on
these models. If head assembly is replaced for service, valves (41595) must be adjusted for the following rates of lift
and descent.
550 LB. CAPACITY HOISTS:
Rate of lift with maximum throttle opening with a 500 lb. load shall be: 50 ft/min. maximum.
Rate of descent with maximum throttle opening and a 500 lb. load shall not exceed: 70 ft/min.
1500 LB. CAPACITY HOIST - Rate of lift and descent with maximum throttle opening with a 1500 lb. load shall not
exceed 16 ft./min.
OIL SCREW (2) 30747
*
"O" RING Y325-9
OILITE CASTING 33190
CONTROL ROD 34021
* VALVE CAP (2) 34026
"O" RING (2) Y325-116
*
SPRING (2) 38966
*
LIFT VALVE 46079
"O" RING (2) 04662045
32
Load Chain
Type
Zinc Plated, Link
Zinc Plated, Link
Figure 24. MHP3445
RETAINING RING Y145-28
SWIVEL 46839
"O" RING (2) Y325-115
WASHER (2) 31389
HEAD 46071
INCLUDES PIPE
PLUG (3) Y227-3
(NOT SHOWN)
SET SCREW (2) 41627-1
46078 HEAD ASSEMBLY
Hooks
Number
37708* Bronze
37708* Bronze
ADAPTER 46211 (MODELS 7712-EL and 7714-EL)
SCREEN 31648
SWIVEL BODY 33314
"O" RING Y325-17
SCREEN 46072
LOCK WASHER (6) Y14-10
CAP SCREW (6) Y154-54
VALVE BODY 37704
N D P U
SHAFT 34025
GEAR 34030
ROLL PIN Y178-56
GEAR 34022
VALVE BODY (2) 41595
Max. Lift Rate
at 90 psig
50 fpm
16 fpm
*
*
*
VALVE 37703
"O" RING Y325-19
LOCK SCREW 34024
NOT SHOWN "O" RING (2) Y325-11
INCLUDED IN SWIVEL KIT 46840
NOT INCLUDED IN HEAD ASS'Y.
*
NOT USED WITH PENDANT CONTROL MODELS
SEE SPECIAL NOTE ABOVE
INCLUDED IN SWIVEL KIT 46841
Max. Descent
rate at 90 psig
70 fpm
16 fpm
*