Gorman-Rupp Pumps 06C1-GHH 1071445 and up - Manual (Page 36)

OM-03179 0 SERIES
MAINTENANCE & REPAIR PAGE E - 11
connect the air lines from the air shift cylinder as­
sembly on the gearbox.
Remove the hardware securing the gearbox to the
rear cross member. Remove the hardware secur­
ing the trunnion to the front cross member.
Move the pump and gearbox to a clean, well‐
equipped shop for maintenance and repair.
Suction Head and Wear Ring Removal
The wear ring (21) and impeller (2) are easily ac­
cessible and may be serviced by removing the suc­
tion head (23).
Remove the nuts (27) and pull the suction head
and wear ring out of the pump casing. Remove the
suction head gasket (25).
Use caution not to damage the suction
head when removing the wear ring (21).
Inspect the wear ring for excessive wear or scoring.
If replacement is required, use a chisel or other
suitable tool to cut it from the suction head. Be
careful not to damage the suction head bore.
Impeller Removal
To remove the impeller, block impeller rotation by
inserting a brass rod through the pump discharge
and between the impeller vanes. Use caution not
to damage the impeller. Remove the impeller nut
(22).
Install 1/4-20 UNC by 4‐inch long capscrews (not
supplied) in the tapped holes in the impeller, and
use a suitable puller to remove the impeller from
the shaft. Use caution when removing the impeller;
tension on the seal spring will be released. Retain
the impeller key (24).
Remove the impeller adjusting shims (19). For
ease of reassembly, tie and tag the shims, or mea­
sure and record their thickness.
Seal Removal
Remove the seal spring. Lubricate the shaft adja­
cent to the seal, and work oil up under the rubber
bellows. Slide the rotating portion of the seal off the
shaft.
Use a pair of stiff wires with hooked ends to remove
the stationary element and O‐ring from the casing
bore.
Pump Casing Removal
The presence of gearbox lubricant in the seal cav­
ity behind the stationary element indicates failure
of the gearbox oil seal (13). Before attempting to re­
move the seal, remove the gearbox drain plug and
gasket (65 and 66, Figure 2A) and drain the gear­
box lubricant. Reinstall the drain plug and gasket.
If the oil seal, O‐ring (11) or gasket (17) require re­
placement, or if the gearbox is to be disassembled,
remove the nuts (16) and slide the pump casing off
the shaft.
Remove the O-ring and gasket (11 and 17). Use a
set of screwdrivers or other suitable tools to pry the
oil seal (13) from the back of the pump casing.
Use caution not to damage the pump cas­
ing when removing the wear ring (18).
Inspect the wear ring (20) for excessive wear or
scoring. If replacement is required, use a small bit
to drill two holes horizontally, 180
_ apart through
the wear ring. Use a chisel or other suitable tool to
complete the cuts and remove the wear ring from
the pumping casing. Be careful not to damage the
pump casing bore..
If no further disassembly is required, proceed with
PUMP AND SEAL REASSEMBLY. If the gearbox
requires disassembly, do not reassemble the
pump components at this time. Refer to GEAR­
BOX DISASSEMBLY and GEARBOX REASSEM­
BLY, followed by PUMP AND SEAL REASSEM­
BLY.
PUMP AND SEAL REASSEMBLY
The instructions in this section are keyed to Figure
1 and the accompanying parts lists.