18
Head Section
Figure 12.
46073–1 Head Assembly (MHP3433)
ADAPTER 46211
RETAINING RING Y145-28
SWIVEL 46839
"O" RING (2) Y325-115
SWIVEL BODY 33314
INCLUDES PIPE
PLUG (3) Y227-3
(NOT SHOWN)
46071 HEAD
FILLER 34028 (3)
WASHER (2) 31389
SCREEN 33672
OIL SCREW (2) 30747
OLITE CASTING 33190
SET SCREW (2) 41598
* CONTROL ROD 34021
* "O" RING Y325-9
VALVE CAP (2) 34026
"O" RING (2) 04662045
"O" RING (2) Y325-116
SPRING (2) 38966
LIFT VALVE 46079
VALVE BODY (2) 41595
"O" RING (2) Y325-11
ROLL PIN Y178-56
GEAR 34022
SHAFT 34025
"O" RING Y325-19
LOCK SCREW 34024
GEAR 34030
VALVE BODY 37704
VALVE 37703
CAP SCREW (6) Y154-54 *
LOCK WASHER (6) Y14-10 *
SCREEN 46072
"O" RING Y325-17
SCREEN 31648
* NOT INCLUDED IN HEAD ASS'Y
NOT USED WITH PENDANT
CONTROL MODELS
INCLUDED IN SWIVEL KIT 46840
Disassembly
1. Remove head from housing as outlined in
2. Remove lock screw (34024), gear (34030) and shaft (34025).
3. Remove valve caps (34026), “O” rings (Y325-116) and springs (38966).
4. Valves (33703) and (46079) with “O” rings (04662045) and valve body (37704) may now be removed from either
end of head housing.
5. Swivel assembly may be disassembled while mounted to head or removed from head. To disassemble, remove
retaining ring (Y145-28), pull off swivel (46839) exposing “O” rings (Y325-115) and swivel body (33314).
6. To remove oilite casting (33190), remove oil screw (30747) and washer (31389) on side of head. Insert
screwdriver into opening and remove oilite costing.
7. Muffler fillers (34028) and screen (33672) are exposed after removal of head from housing and may be removed.
8. To remove regulator valve (41595), remove set screws (41598) and pull valves from housing.
Assembly
1. Assemble screen (33672) and fillers (34028) to head. Assuming other hoist components are assembled to
housing, assemble head to housing with gasket (41623). Secure with washers (Y14-10) and screws (Y154-54).
2. Assemble “O” rings (Y325-17) and (Y325-115) and screen (46072) to swivel body and assemble to head.
Assemble swivel to swivel body and secure with retaining ring (Y145-28). Assemble screen (31648) and adapter
(46211) to swivel.
3. Assemble oilite casting (33190), screw (30747) with washer (31389) and regulator valves (41595) with “O” rings
(Y325-11) to head.
Note:
Assemble valves to head with slot in valve positioned to accept set screw. Secure valves with set screws
(41598). After complete assembly of hoist, loosen set screw and adjust valve for desired rate of lift and
descent. Refer to
“Air and Lube Requirements,” p. 8
.
4. With gear (34022) and control rod assembled to housing, assemble valve parts, see
Summary of Contents for 7700-E Series
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