26
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7. With motor/pump block (25) still in vise, install lower seal
(24) by pushing it towards its groove with a properly sized
blunt rod. Then complete installation with the fingers. No
tool is necessary. Do not twist the seal.
8. Pre-lubricate the piston and valve rod assembly with
Coolflo™ hydraulic fluid (P/N 430-361). Install piston rod
(21) into motor/pump block (25) with a gently pushing and
rotating motion to work the piston rod in through the seal
(24).
9. Replace the connecting rod pin and retainer ring. See
illustration below.
10. Install o-ring (12) on cylinder wall. Lubricate ring and inner
wall. With the piston rod held firmly, the cylinder should be
gently driven over the piston seal with a rubber mallet.
Tightly thread the cylinder into motor/pump block (25).
11. Raise piston rod (21) to top position and thread lock ring
(22) all the way up on upper threads of cylinder (23).
12. Pull valve rod assembly (20) up as far as it will travel and
grasp it with vise grip pliers. Then install cylinder head
(11), already assembled, over valve rod until the top
threads of the valve rod pass through the top of the
spool/sleeve set (5). The valve rod threads must be clean
and free of oil. Place one drop of blue Loctite on threads
of flex lock nut (9) and thread nut onto valve rod to full
tight position (do not over-tighten) while holding valve rod
below with vise grip pliers.
13. Thread cylinder head (11) down onto the cylinder (23) and
then back off just enough to reassemble hydraulic fittings
and motor tube (26). Tighten lock ring with spanner
wrench to hold cylinder head in position.
14. The tee assembly (27) and the elbow (15) use an o-ring
(27a) to seal on the outer diameter (O.D.) of the motor
tube (26). The O.D. of the motor tube should be free of
scratches or sharp edges. The lock nuts on these fittings
first should be hand tightened, then wrench tightened
another half turn.
15. Install o-ring (8) onto cylinder head plug (7). Tighten.
Motor Service Kit, Minor (P/N 235-050)
Item
Part #
Description
Quantity
2
141-007
O-ring .......................................................2
3
325-005
Trip spring ................................................2
4
569-016
Ball, SS.....................................................2
6
441-152
O-ring .......................................................3
8
441-217
O-ring .......................................................1
9
858-811
Flex lock nut .............................................1
12
431-032
O-ring .......................................................2
18
235-027
Piston seal................................................1
19
235-026
O-ring .......................................................1
24
235-028
Rod seal ...................................................1
Connecting Pin Arrangement
NOTE: Inspect the bottom of piston rod (21) for nicks
or sharp areas that could damage the piston
seal during installation through the
motor/pump block (25).
Fluid Pump
Fluid Pump Service Instructions
Disassembly
1. Remove siphon tube assembly. Unthread the foot valve
(16) and the pump cylinder (12) with a strap wrench.
2. Slide the retainer ring (1) up with a small screwdriver, then
push the connecting pin (2) out.
3. Pull the displacement rod (6) through the lower cavity of
the motor/pump block.
IMPORTANT: USE OF NON-SPEEFLO MANUFACTURED
SERVICE PARTS MAY VOID WARRANTY.
ASK FOR ORIGINAL PARTS MADE BY
SPEEFLO FOR BEST SERVICES. This
pump should receive a routine servicing
after approximately 1,000 hours of use.
Earlier servicing is required if there is
excessive leakage from the top packing
or if pump strokes become faster on one
stroke or the other. The use of Speeflo
Piston Lube (P/N 700-925) is
recommended as an upper packing
lubricant. DO NOT SUBSTITUTE OIL,
WATER, OR SOLVENT for an upper
packing lubricant.
Peaks of upper
packings must
face up.
Torque piston
retainers to
75 ft./lbs.
(1095 N/m).
Use blue
Loctite.
Wet cup area
for piston lube
packing
lubricant.
Peaks of lower
packings must
face down.
Lubricate O-ring.
