Part No. 238039 Fluid Regulator Repair - Graco PRO 5500wb Instructions-Parts List Manual

Part No. 238039 Fluid Regulator Repair

NOTE: The fluid regulator is item 17 in the parts list for
the part no. 238091 spray gun. It is not included with
part no. 237603 and 236824 spray guns. A Conversion
Kit is available to add the fluid regulator to those spray
guns. See page 47.
1. Prepare the gun for service as instructed on
page 35.
2. Remove the barrel as instructed on page 41.
3. Remove the regulator assembly from the gun
barrel by loosening the outlet fitting (B) from the
gun barrel (C) and disconnecting the air tubing (90)
from the elbow fitting (E). Refer to Fig. 43.
4. Disassemble the regulator parts as shown in
Fig. 42.


Make sure the seat (408) is aligned with the regulator body (401)
threads to avoid cross-threading.

PTFE side of diaphragm (413) faces up, toward body (401).

Tighten the cover (402) firmly
406
*404 *418 405
403
Fig. 42
46 308496
Service
411*
401
410
409*
415*
408*

412
413* 
407*
402 
420
421
05931
5. Replace the o-rings, seat, ball bearing, and dia-
phragm with the parts included in the Regulator
Repair Kit, part no. 238148.
6. Be sure all the parts are clean and dry, then re-as-
semble the regulator.
7. Screw the regulator outlet fitting (B) into the gun
barrel (C), and tighten the fitting securely. Connect
the air tubing (90) to the elbow fitting (E). Refer to
Fig. 43.
8. Install the barrel on the gun body as instructed on
page 44.
9. Install the gun onto the manifold as instructed on
page 44.
Fluid Regulator Parts List
Includes items 401 to 418
Ref.
No. Part No. Description
401 238037 BODY ASSY.
402 190868 COVER
403 109193 ELBOW, tube fitting
404* 111316 O-RING, fluoroelastomer
405 190872 OUTLET FITTING
406 190871 OUTLET STEM
407* 110497 O-RING, Vitonr
408* 188944 SEAT
409* 102922 BALL BEARING
410 112204 SPRING, compression
411* 111450 O-RING, CV–75
412 238215 ACTUATOR
413* 187168 DIAPHRAGM
O-RING, PTFE r
415* 107505
418* 102982 O-RING, PTFE
420 191406 COVER
421 113522 SCREW, 1/4–20
* These parts are included in Repair Kit 238148, which may
be purchased separately.
Qty.
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4