Clean and Inspect Parts
1. Clean all the parts in a compatible solvent. Inspect
them for wear and damage, replacing parts as
needed. Lubricate the parts before assembling.
2. Check the outer surface of the displacement rod
(461 and the inner surface of the cylinder (27) for
nicks, scratches and wear. A scored rod or cylinder
will cause premature packing wear and leaking.
Reassemblv
1.
One at a time, install the o-ring (21), packing (18”“)
and washers (28”“) in the packing housing (32). Be
sure the lips of the packing face down. Always
replace the washers when you replace the packing.
Screw the housing (32) into the housing outlet (261,
and torque to 80-100 ft-lb (110-135 N-m).
2.
3.
4.
5.
6.
7.
Loosely screw the packing nut (34) into the packing
housing (32).
One at a time, install the packing (18”“) with the
lips facing down, the spacer (351, the back-up
washer (28**), the other packing (18”“) with the
lips facing up, and the washer (39) onto the piston
(47). Place the steel ball (16”“) onto the piston.
Screw the piston into the displacement rod (461,
torquing it to 80-100 ft-lb (100-135 Nam).
Screw the priming rod (30) into the piston, aligning
the holes. Reinstall the cotter pin (14).
Secure the outlet housing (26) in a vise. Install a
new gasket (22”“) on the pump cylinder (27). Posi-
tion the cylinder in the outlet housing.
Lubricate the cylinder (27) and displacement rod
(46). Carefully slide the displacement rod assembly
through the cylinder.
8.
9.
10.
11
12.
13.
14.
Assemble the gasket W!**), valve stop (23) and
other gasket EY’), and place them on the end of
the cylinder.
Assemble the packing nut (291, packing (17”“) with
the lips facing up, and the seal and seat (44). Then
slide them onto the priming rod (30). Position the
intake housing (31) on the cylinder (27).
Insert the tie bolts (19) through the pump tie plate
(33) and screw the bolts into the intake housing
(31). Torque the tie bolts to 57-63 ft-lb
(77-86 N-m). Torque the packing nut (34) to
9-11 ft-lb (12-15 N.m).
Assemble the valve plate guide (381, valve plate
(361, piston plate (371, and jam nut (15) onto the
priming rod (30). Torque the jam nut to 50-60 ft-lb
(61-75 Nmm).
Secure the connecting rod (9) to the displacement
rod (46) with the cotter pin (1). Screw the locknut
(4) down.
Fill the wet cup (45) with TSL. Start the pump and
operate it slowly, at about 40 psi (3 bar) air pres-
sure, to check the tie rods for binding. Adjust the tie
rod locknuts, if necessary, to eliminate binding.
Reinstall the pump in its mounting. If the ground
wire was disconnected during servicing, be sure to
reconnect it before operating the pump.
306-970
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