Repair; Inlet Housing Disassembly - Graco Z-Pump S1 Series Instructions - Parts Manual

Repair

Required Tools
• Large vise
• Set of adjustable wrenches
• 1 in. wrench (S4 only)
• 1 1/4 in. Allen hex wrench.
• 3/8 in. Allen hex wrench (S4 only)
• 1 1/4 in. wrench (S4 only)
• 1 1/8 in. crowfoot wrench (S4 only)
• O-ring pick
• Rubber mallet
• Torque wrench
• 2 1/4 in. and 3 in. hex sockets
• Anti-seize lubricant
• Removable strength thread locker
• Grease (compatible with the material being
dispensed)

Inlet Housing Disassembly

Models S1 and S3 Pumps
S1 and S3 models can be identified by the hex head
(not square) on the inlet valve cap (113).
1. Relieve pressure and flush system. See Pressure
Relief Procedure and Flushing, page 10.
2. Remove inlet hose and drain inlet housing (106).
3. Remove inlet valve cap (113) from inlet housing
(116), and remove O-ring (108). See F
F . 3
IG
3A0019ZAC
4. Remove upper ball cage housing (112), ball check
5. Press lower SST ball (110) off carbide seat (109)
6. Remove O-ring (108), lower ball cage housing (112),
F
IG
7. Clean all parts in a compatible solvent. Lay them in
. 3.
IG
113
Model S4 Pumps
108
NOTE: S4 models can be identified by the square head
(not hex) on the inlet cap (136) being square.
106
1. Relieve pressure and flush system. See Pressure
r_257891_3a0019_4h
spring (111), SST ball (110), O-ring (108) and
carbide seat (109).
from fluid inlet and drain the inlet housing (106).
ball check spring (111), SST ball (110), carbide seat
(109), and O-ring (108). See F
111
110
108
109
106
. 4
order for easier reassembly. Inspect each ball and
seat for nicks or scratches; replace as required.
Relief Procedure and Flushing, page 10.
Repair
. 4.
IG
112
108
112
111
110
109
108
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11