Graco 3900 Instructions

INSTRUCTIONS-PARTS LIST
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
INSTRUCTIONS
Kit, Reversible Handle
Line Lazer 3900, 5900
3300 psi (230 bar, 23 MPa ) Maximum Working Pressure
Model 240714, Series A
Related Manuals
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WARNING
INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
starting or spraying accidentally. Fluid
under high pressure can be injected through the
skin and cause serious injury. To reduce the risk of
an injury from injection, splashing fluid, or moving
parts, follow the Pressure Relief Procedure
whenever you:
are instructed to relieve the pressure,
stop spraying,
check or service any of the system equipment,
or install or clean the spray tip.
Pressure Relief Procedure
1. Lock gun trigger safety.
2. Turn engine ON/OFF switch to OFF.
3. Move pressure control switch to OFF and turn
pressure control knob fully counterclockwise.
4. Unlock trigger safety. Hold metal part of gun firmly
to side of grounded metal pail, and trigger gun to
relieve pressure.
5. Lock gun trigger safety.
6. Open pressure drain valve. Leave valve open until
ready to spray again.
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
7. Disconnect spark plug cable.
If you suspect that the spray tip or hose is completely
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clogged, or that pressure has not been fully relieved
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after following the steps above, VERY SLOWLY
loosen tip guard retaining nut or hose end coupling to
relieve pressure gradually, then loosen completely.
Now clear tip or hose.
Remove Cables, Hoses, Wir-
ing, and Handle Assembly
Fig. 1. Remove cables, hoses, wiring, and handle from
LineLazer cart as outlined in the following steps.
8. Unfasten paint gun cable (58) from linestriper
9. Unfasten swivel wheel cable (102) from actuator
10. Separate gun hose (17) from coupled hose (11).
11. Unfasten coupled hose (25) from pressure
12. Disconnect power cable (62) from pressure
13. Remove mounting bracket (103), brake rod (105),
COPYRIGHT 1999, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
First choice when
quality counts.
trigger (19). Remove spring clips (130) to free
cable from linestriper handle (24). Move cable and
clips aside for reassembly later.
lever (101). Remove spring clips (130) to free
cable from linestriper handle (24). Move cable and
clips aside for reassembly later.
Move gun hose aside for rerouting during reas-
sembly.
control (2). Move aside for rerouting later.
control (2). Move aside for rerouting later.
attaching hardware: two flange screws (54) and
two lock nuts (55).
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Rev. A
8922A