12/06/99
2
SDS PUMP REBUILD INSTRUCTIONS
Rev.4/92
1. Remove cable guard screws (Item 1).
2.
Remove 1/8” pipe plug (Old Style) or 3/8” NC set screw (New Style)
(Item 5) using a 3/16" hex wrench. WARNING: PUMP HOUSING MAY BE UNDER
HIGH PRESURE. USE EXTREME CAUTION IN REMOVING END CAP PLUGS AND END CAP
SCREWS.
3.
Remove the two socket head screws (Item 26) from end cap (Item 6) using
a 5/32" hex wrench.
4.
Clamp the pump in the puller and screw the proper threaded mandrel in
the end cap.
5.
Pull the end cap out of the stainless housing. If the brass ends seem to
be stuck, warm the stainless housing slightly with a small propane
torch, being careful not to overheat and warp the housing. As the end
cap (Item 8) comes out, disconnect the two motor wires plugged into the
end cap.
6.
With the end cap removed from the housing, turn the pump around, screw
the appropriate mandrel into the discharge head, and remove the pump
assembly from the stainless housing.
7.
Remove the four socket head screws (Item 25) from the discharge head
using a 5/32", hex wrench.
8.
Remove the bypass valves and springs (Items 19 & 20), suction 5creen
(Item 24), check valve assembly (Item 21), and gasket (Item 22) from the
discharge head. Note: Check valve removal may require a lite tap with a
blunt tool through the discharge opening.
9.
Remove the two motor adapter screws (Items 4) using a 5/32”, hex wrench.
Remove the set screw from the cam assembly (Item 13) using a long 1/8”,
hex wrench. This wrench must be inserted through the hole in the side of
the motor adapter (Item 16). Before inserting the wrench, visually align
the set screw with the hole by turning the motor adapter while holding
the motor.
10.
Pull the motor adapter and cam assembly away from the motor, remove the
two piston screws (Item 12), and then the cam assembly (Item 13).
11. Discard the support collars (Item 14), O-ring6 (Items 9), diaphragm (Item
17), check valve (Item 23), and gasket (Item 22).
12. Clean and inspect all remaining parts and make sure that the electrical
studs protruding from the epoxy in the end cap are in good condition and
the epoxy is still hard.
Summary of Contents for SDS - REV 4-92
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