GPI M-1115S, Owner'S Manual

Page: 5 / 12

Rev. A 92149901
5
Replace Gears and Drive Key
• Turn the pump off and disconnect from power.
• Remove the gear coverplate. (Figure 4)
FIGURE 4
• Lift the drive key and gears from the pump. (Figure 5)
FIGURE 5
• Inspect the gears and key for wear and damage.
Replace, as necessary.
• Wipe the gear cavity with a clean cloth.
• Replace the gears. Make sure they turn freely.
• Replace the drive key.
• Make sure the gear coverplate O-ring is securely in
place. Tighten the coverplate to the housing.
Clean or Replace Bypass Poppet
• Turn the pump off and disconnect from power.
• Using a drive ratchet or extension, remove the pipe
plug from the top outlet port. (Figure 6)
FIGURE 6
• Remove the gear coverplate and O-ring from the
pump housing.
• Lift the drive key and two gears from the pump.
• To clean the bypass poppet:
– With a clean cloth, wipe the poppet cavity through
the top outlet port.
– Push down on the poppet until the poppet O-ring
is exposed inside the housing. (Figure 7)
FIGURE 7
– Using a clean cloth, rotate the poppet and clean
it thoroughly.
• To remove or replace the bypass poppet:
– As above, push down on the poppet until the
O-ring is exposed.
– Remove the O-ring with a small screwdriver or
similar tool. Take care not to damage the poppet
or O-ring. (Figure 8)
FIGURE 8
– From inside the housing, use a small screwdriver
to push the poppet and spring through the top
outlet port. (Figure 9)
FIGURE 9
– Wipe the poppet and gear cavities with a clean cloth.
– Replace the poppet, O-ring, and spring, as necessary.
NOTE: Replace O-ring if damaged, swollen, or loose-
fitting.
• To assemble, place the spring and poppet into the
poppet cavity through the top outlet port. Compress
the poppet into the housing. Coat the O-ring lightly
with grease and slip over the poppet head. Make sure
the O-ring is well seated.
• Push on the poppet through the top outlet port to
make sure it moves freely.