Kärcher BD-405039E Service Manual page 23

Ar-AL UNLOADEr ExpLODED viEw AND pArTS LiST
iTEM pArT NO. DEScripTiON
1 8.718-371.0 Check Connector
2 9.804-536.0 ‡ O-Ring 2068
3 9.804-646.0 Shutter Spring
4 9.804-538.0 Shutter
5 9.804-539.0 ‡ O-Ring 631290 SH
6 83-005170102 1/4 g Plug
7 83-005030101 M8 Lock Nut
8 83-005100100 Knob
9 83-005150101 Washer
10 83-005400403 4000 PSI Spring (Black)
11 83-005150011 Stem guide Union
12 9.804-588.0 ‡ Back Ring
13 9.804-589.0 ‡ O-Ring 2031
14 83-005160502 Stem aL606
14 83-005160514 Stem aL607
1. Remove lock nut (Item 7).
2. Remove adjustment knob (Item 8).
3. Loosen the two (2) nuts (Items 25), move them upward on stem (Item 14) until you see 4 or more threads
below the nut.
4. Re-attach adjusting knob (Item 8).
5. Start machine. Open the trigger of the spray gun. Increase pressure by turning adjustment knob (Item 8)
clockwise until pressure is at the desired operating pressure.
6. Remove the adjustment knob (Item 8), tighten the lower nut (item 25) tightly against the upper nut (Item 25).
Re-attach adjustment knob (Item 8) and screw down until contact is made with the nuts (Item 25). Screw down
lock nut (Item 7) onto the stem (Item 14) until the threads cut into the nylon insert of the lock nut (Item 7).
*If adjustment knob (Item 8) DOES NOT make contact with upper nut (Item 25), remove adjusting knob (Item
8), re-adjust (raise) nuts (Items 25) on stem (Item 14) and re-attach adjustment knob (Item 8), then repeat step
#6.
**If adjustment knob (Item 8) 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 pressure exceeds the 500 psi limit, remove the adjusting knob (Item 8) and re-adjust
(lower) the nuts (Items 25) on the stem (Item 14). Re-attach the adjusting knob (Item 8), then repeat step #6.
QTY iTEM
1
3
1
1
1
1
1
1
1
1
1
2
1
1
1
Unloader Adjustment procedures
9.800-414.0 • Rev. 11/09
pArT NO. DEScripTiON
15 83-005106301 Spring Pin
16 83-005000101 Back Ring
17 9.804-590.0 ‡ O-Ring 2050
18 83-005020003 Body By Pass 1/4 g-F
18 83-005020026 Body By Pass 3/8 g-F
19 83-005060200 3/8 gasket
20 9.804-591.0 ‡ O-Ring 2043
21 9.804-592.0 ‡ Seat
22 9.804-593.0 ‡ Ball
23 8.718-370.0 Ball Spring
24 83-005150009 Seat Union
25 83-005030200 M8 Nut
26 83-005170101 3/8g Plug
27 83-005060201 gasket
8.720-559.0 ‡ repair kit
QTY
1
2
1
1
1
1
1
1
1
1
1
2
2
1
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