9.801-760.0 Service Manual, Catch Up
21
PRESSURE W
ASHER
SER
VICE MANU
AL
VRT3 UNLOADER EXPLODED VIEW AND PART S LIST
9
8
23
26
3
16
1
10
24
11
6
4
13
14
20
25
12
22
19
15
2
15
21
17
18
7
9
5
6
8.750-297.0, 8 GPM, 2320 PSI
8.750-298.0, 8 GPM, 3630 PSI
8.750-299.0, 8 GPM, 4500 PSI
ITEM PART NO.
DESCRIPTION
QTY
25 8.750-712.0 Outlet Fitting
1
18 8.750-713.0 Knob, Unloader
1
8.750-709.0 Repair Kit, VRT3, 2320/3630
PSI
8.750-710.0 Repair Kit, VRT3, 4500 PSI
(Kit Items: 1, 4, 8-12, 16, 21-22)
1.
Remove lock nut (Item 19).
2.
Remove adjustment knob (Item 18).
3.
Loosen the two (2) nuts (Item 15), move them upward on stem (Item 8) until you see 4 or more threads below the nut.
4.
Re-attach adjusting knob (Item 18).
5.
Start machine. Open the trigger of the spray gun. Increase pressure by turning adjustment knob (Item 18) clockwise until
pressure is at the desired operating pressure.
6.
Remove the adjustment knob (Item 18), tighten the lower nut (Item 15) tightly against the upper nut (Item 15). Reattach
adjustment knob (Item 18) and screw down until contact is made with the nuts (Items 15). Screw down lock nut (Item 19)
onto the stem (Item 8) until the threads cut into the nylon insert of the lock nut (Item 19).
*If adjustment knob (Item 18) DOES NOT make contact with upper nut (Items 15), remove adjusting knob (Item 18), re-adjust
(raise) nuts (Items 15) on stem (Item 8) and re-attach adjustment knob (Item 18), then repeat step #6.
**If adjustment knob (Item 18) DOES make contact with upper nut; release the trigger of the spray gun and watch the pressure
gauge for the pressure increase (“spike”). This “spike” SHOULD NOT exceed 500 psi above the operating pressure. If “spike” pres-
sure exceeds the 500 psi limit, remove the adjusting knob (Item 18) and re-adjust (lower) the nuts (Items 15) on the stem (Item 8).
Re-attach the adjusting knob (Item 18), then repeat step #6.
Unloader Adjustment Procedures
