Priming Piston Service
7. Remove the retaining pin (118), o-ring (119), and
ball (110). Pull the connecting rod (109) from the
displacement rod (117). Remove the seal (120).
ti15641a
117
120
110
109
118 119
Figure 5 Disassemble piston valve.
8. Remove the packing housing (103) from the top
of the cylinder (101). Remove the bearing (106),
packing (105), and o-ring (104).
9. Clean and inspect all parts. Refer to
Cleaning, page 9
. Replace the parts as
necessary.
106
104
105
103
101
117
ti15640a
Figure 6 Remove packing housing.
Reassemble After Cleaning
Note: Any damaged parts must be replaced.
Note: Lubricate the o-rings, throat packings, and
piston seals with waterproof appropriate sanitary
lubricant.
1. Install the v-block packing (105*) and bearing
(106*) in the packing housing (103). The lips of
the packing must face down into the housing,
and the lip of the bearing must face up. Install
the o-ring (104*) on the outside of the housing.
2. Install the seal (120*) on the piston valve housing
at the top of the connecting rod (109). Place
the ball (110) on the seat of the housing. Install
the displacement rod (117) over the top of the
connecting rod so the holes in both parts align.
Secure with the retaining pin (118) and o-ring
(119*).
3. Lubricate and place the packing housing (103) in
the top of the cylinder.
4. Lubricate and slide the displacement rod (117)
up through the cylinder so it protrudes from the
packing housing (103). Model 24G746 only:
Make sure the drip shield (121) is in place on the
cylinder (101).
5. Lubricate and install the packings (115*) into the
center of the poppet (114).
6. Lubricate and install the bearing (112*) into the
center of the valve stop (111).
7. Slide the valve stop (111), spring (113*), and
poppet (114) onto the connecting rod (109).
8. Install the gasket (102*) and the intake valve
housing (107). Secure the housing (107) to the
cylinder (101) with the clamp (123).
9. Install the priming piston (108) and retaining pin
(116) on the connecting rod (109).
10. Slide the displacement rod (117) into the coupler.
Then, attach the clamp (123) to hold the pump
to the motor base.
12
3A0733P
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