Graco Inc. 3040 Pressure Washer User Manual


 
Reassembly:
V-Packlng Models:
1.
Lubricate high pressure packing area in manifold.
2. Insert male adapter with notches down and
"v"
side
UP.
3. Lubricate v-packings and install one-at-a-time
with grooved side down.
4. Next install female adapter with grooved side
down.
5.
Examine seal case O-ring and replace if wom.
Lubricate new O-ring before installing.
6.
Thread seal case into manifold and tighten with key
Hlgh Pressure Seal Models:
1. Lubricate seal area in manifold.
2. Carelully square seal into positlon by hand with the
3.
Examine seal case O-ring and replace
if
wom.
4.
Next secure high pressure seal into position by
threading seal case into manifold. Tighten seal
case with key wrench.
wrench.
metal grooved side up.
Lubricate new O-ring before installing.
Low
Pressure Seal-All Models:
1. Examine seal for wear or broken spring and lace
if
necessary.
2. Install low pressure seal in seal case with garter
3.
Reinstallhap ring. Be certain snap ring
is
a tight
fit.
spring down.
Replace
if
it can be easlly tumed.
4.
Replace manifold on pump as described and
torque per chart.
Servicing
Crankcase
Section
1. While manifold, plungers and seal retainers are
removed, examine crankcase seals for wear.
2. Check oil level and for evidence of water in oil.
3. Rotate crankshaft by hand to feel for smooth
bearing movement.
4.
Examine crankshaft oil seal externally for drying,
5.
Consult factory or your local distributor
if
crankcase
cracking or leaking.
service is evidenced.
Torque Chart
Pump Part Thread
Tool
Slze Torque
Plunger M5
11
mm hex
80
in. Ibs.
Retainer
Manifold
ME
x
1.25 13 mm hex 125 in. Ibs.
M10x1.25 17mmhex 217in.Ibs.
M10 17 mm hex 217 in. ibs.
~~
Valve
-
24 mm
Covers
75 fl. Ibs.
27 mm
75
fl. ibs.
308-531
19