Graco GM 3500 Instructions-Parts List Manual page 15

WARNING
To reduce the risk of serious bodily injury, always
follow the Pressure Relief Procedure Warning on
page 13 before repairing the sprayer.
1. Disconnect both hoses (59) at the pressure control
(63), while holding the elbows firmly. See the CAU-
TION below. Note the original location of each hose
to be sure you reassemble them correctly at the end
of this procedure. See Fig 15–1.
CAUTION
DO NOT allow the elbow (314 or 322) to turn when
removing or connecting the hoses. Turning the el-
bows can damage the sensitive bourdon tube.
64
76
62
314
312
59
TO TO
FILTER
PUMP
MOUNTING FOR UPRIGHT CART SHOWN
Fig 15–1
WHITE
BLACK
VIEW FROM UNDER ENGINE MOUNTING
PLATE ON UPRIGHT CART
Fig 15–2
PRESSURE CONTROL REPLACEMENT
63
67
96
(See Step 2,
page 19)
66
29
TO FIELD
TO ENGINE
61,9
RED
32
2. Working under the engine mounting plate of the cart,
disconnect the red, black and white wires. For the Up-
right cart, remove the three nuts (61) and lockwash-
ers (9) from the capscrews (62). For the Lo–boy cart,
remove the two screws (62) and washers (9). See Fig
15–2.
3. Remove the wire clamp (32). Remove the pressure
control. See Fig 15–2.
4. Remove the pressure control cover (76) and the
mounting bracket (67). See Fig 15–1.
322
312
59
TO TO
FILTER
PUMP
MOUNTING FOR LO–BOY CART SHOWN
9,62
66
BLACK
VIEW FROM UNDER ENGINE MOUNTING
PLATE ON LO–BOY CART
64
76
63
67
66
29
TO FIELD
32
TO ENGINE
WHITE
RED