Graco 17J866 Instructions Manual
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Graco 17J866 Instructions Manual

Repair kits for magnum prox & gx sprayers
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Repair Kit Instructions
Repair Kits for
Magnum ProX & GX Sprayers
Use these instructions when repairing the ProX or GX sprayers.
IMPORTANT SAFETY INSTRUCTIONS
Read all warnings and instructions in the repair kit instructions and in the Owners/Operation manual for the
sprayer.
Contents
Section
Description
2 Control
3 Pump
Refer to the illustrations in this document and your
Owners/Operation manual for additional parts
information, wiring diagrams, and any additional
assembly torques that you may need.
Pressure Relief Procedure
Before servicing the sprayer, pump pressure must be
relieved.
SKIN INJECTION HAZARD: This sprayer builds up
an internal pressure of 3000 psi (20.7 MPa, 207
bar) during use. This equipment stays pressurized
until pressure is manually relieved. Follow this
Pressure Relief Procedure whenever you stop
spraying and before cleaning, checking, servicing,
or transporting equipment to prevent serious injury.
1. Turn ON/OFF switch to the OFF position.
2. Engage the trigger lock. Always engage the trigger
lock when sprayer is stopped to prevent the gun
from being triggered accidentally.
Kit #
17J866
17F756, 17F757, 17F758, 17K285,
17K684, 17L083
16X980, 287770
17J863, 17J864, 17J869
17J867, 17J885
17J881, 17J927
17J925
17J880
17J876, 17J877, 17J924
17J878
3. Turn pressure control to lowest setting.
4. Put drain tube into a pail and place Prime/Spray
valve in PRIME position (drain) to relieve pressure.
5. Hold the gun firmly to a pail. Point gun into pail. Dis-
engage the trigger lock and trigger the gun to
relieve pressure.
6. Engage the trigger lock.
7. If you suspect the spray tip or hose is clogged or
that pressure has not been fully relieved:
a. VERY SLOWLY loosen the spray tip guard
retaining nut or the hose end coupling to relieve
pressure gradually.
b. Loosen the nut or coupling completely.
c. Clear airless hose or spray tip obstruction.
CALIFORNIA PROPOSITION 65
This product contains a chemical known to the State of
California to cause cancer, birth defects or other repro-
ductive harm. Wash hands after handling.
3A3951D
EN

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Summary of Contents for Graco 17J866

  • Page 1: Table Of Contents

    Read all warnings and instructions in the repair kit instructions and in the Owners/Operation manual for the sprayer. Contents Section Description Kit # Front Cover Replacement page 3 17J866 Motor Replacement page 4 17F756, 17F757, 17F758, 17K285, 17K684, 17L083 1 Drive Fan Replacement page 4 16X980, 287770 Gear &...
  • Page 2 Drive Drive Drive Assembly Drawing Ref. Torque 140-160 in-lb (16 - 18 N•m) 30-35 in-lb (3.5 - 4.0 N•m) 110-120 in-lb (12 - 14 N•m) ti28539a Description Ref. Description Ref. 10b Wire cover Motor 10c Cable Machine screw (T-30 Torx) Gear and yoke Switch bracket Power cord...

  • Page 3: Front Cover Replacement

    Drive Front Cover Replacement See Drive Assembly Drawing page 2 and your Own- ers/Operation manual for illustrations. Disassembly 1. Perform Pressure Relief Procedure, on page 1. 2. Unplug sprayer. Remove Motor Shield 3. Remove two machine screws (9) and motor shield (8).

  • Page 4: Motor Replacement

    Drive Motor Replacement 7. Install gear and yoke (2). See Gear & Yoke Replacement page 5. See Drive Assembly Drawing page 2 and your Own- 8. Install front cover see Front Cover Replacement ers/Operation manual for illustrations. page 3 assembly procedure. 9.

  • Page 5: Gear & Yoke Replacement

    Drive e. Position the push nut and socket at the end of e. Place a push nut (54b) on a 3/8” or 10mm the motor shaft. Use a small or light (8 oz./225g) socket. hammer to drive the push nut (54b) onto the Position the push nut and socket at the end of shaft.
  • Page 6 Drive Assembly 8. Remove yoke (D) with the two yoke guide rods (C) from the drive housing. 1. Use applicator brush to spread entire contents of 9. Remove gear (A) from drive housing. grease tube (included in kit) into gear teeth. Grease must be worked into roots of gear teeth to ensure long life.

  • Page 7: Control Board Replacement

    Control Control Control Board Replacement 2. Reconnect the power cord connector(s) to the cor- rect leads on the control board (15). Refer to your Owners/Operation manual for wiring dia- 3. Connect appropriate control board (15) lead(s) to grams. the ON/OFF switch (17). 4.
  • Page 8 Pump Pump Pump Assembly Drawing Ref. Torque Ref. Torque Ref. Torque 140-160 in-lb (16 - 18 N•m) 30-35 in-lb (3.4 - 4.0 N•m) 320-380 in-lb (36 - 43 N•m) 270-330 in-lb (30 - 37 N•m) 220-250 in-lb (25 - 28 N•m) ti27488a1 Ref.

  • Page 9: Pressure Control Replacement

    Pump Pressure Control Replacement Assembly 1. Examine pressure control (28) to verify that O-ring (28c) is on the pressure control (28). If O-ring is not Disassembly installed on pressure control, install O-ring. 1. Perform Pressure Relief Procedure, on page 1. 2.

  • Page 10: Prime/Spray Valve And Knob Replacement

    Pump Prime/Spray Valve and Knob 7. Slide pump assembly onto the mounting pins. Replacement Disassembly 1. Perform Pressure Relief Procedure, on page 1. 2. Unplug sprayer. 3. Turn knob (A) up to SPRAY position. 4. Remove pin (B) with pin punch and hammer. ti27036a 8.

  • Page 11: Pump Outlet Valve Replacement

    Pump Assembly 13. Install pin (B) through hole in knob (A). Tap pin through knob with hammer. End of pin will be flush 7. Apply sealant (provided in kit) to valve threads. with top of hole in knob when correctly installed. Install valve stem assembly in pump manifold and torque.

  • Page 12: Pump Inlet Valve Replacement

    Pump Pump Inlet Valve Replacement d. Install ball (4) into ball guide (2). 2. Make certain O-ring (6a) is installed on inlet valve housing (6). Disassembly 3. Thread new inlet valve housing into pump housing 1. Perform Pressure Relief Procedure, on page 1. (1) and torque.
  • Page 13 Pump Pump Packing O-ring Replacement Remove pump packing assembly (25) and replace O-ring (21) with new one. 1. Remove pump housing (1) from sprayer. See Pres- sure Control Replacement, on page 9 for pump removal. 2. Insert hex end of pump into hex tool in the sprayer frame and turn counter-clockwise to loosen assem- bly.
  • Page 14 For the latest information about Graco products, visit www.graco.com TO PLACE AN ORDER, contact your Graco distributor or call 1-800-690-2894 to identify the nearest distributor. All written and visual data contained in this document reflects the latest product information available at the time of publication.

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