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18 312766N
4. Push down on the pump connecting rod
(37) until fluid piston assembly is clear of
displacement pump frame (36). Pull the
piston assembly and connecting rod out of
the frame. Remove the bearing (31) and
seal (51) from the frame.
5. Unscrew the piston body (23) from the pis-
ton valve housing on the fluid piston rod
(19).
6. Unscrew the fluid piston rod (19) from the
pump connecting rod (37). Remove the cup
packing (17) and bearing (18).
F
IG
. 16
Scoring or irregular surfaces on the
connecting rods (37, 19) or polished
inner wall of the pump frame (36) and
piston cylinder (58) can cause prema-
ture packing wear and leaking. To
check these parts, rub a finger over
the surface or hold the part up to the
light at an angle. Replace if neces-
sary.
TI17180b
37
36
51
31
★ Support the Series A and B pump frame with a
strap wrench. Series C pumps have wrench flats.
★
F
IG
. 17
F
IG
. 18
ti11660a
23
21
22
21
20
3
19
312766D_no seal
19
17
18
37