Quick-Reference Repair Parts for
Graco GMax II 3900

Replaces OEM P/N	Bedford P/N	Description / Reference / Notes
Repair Kits
Displacement Pump (Fluid Section)
248-212	20-2662	Repair Kit with Leather & Polyethylene Packings
Piston Rods
240-518	57-2670	Piston Rod (chrome plated stainless steel)
244-216	- - -	Piston Rod (carbon steel - use alternate P/N 240-518)
248-206	57-2670	Piston Rod (chrome plated stainless steel - use alternate P/N 240-518)
Cylinders & Sleeves
240-521	57-2273	Sleeve (stainless steel)
248-209	57-2273	Sleeve (stainless steel - use alternate P/N 240-521)
287-551	- - -	Cylinder
Carbide Ball Seats, Check Valves & Check Balls
Upper Ball Seat (Outlet Seat)
239-932	58-2564	Piston Valve (Stainless Steel Housing)
248-502	- - -	Replaced by 287-877
287-877	58-3178	Piston Valve (Plated Steel Housing)
105-444	9-140	Piston Ball (stainless steel)
Lower Ball Seat (Intake Seat)
239-922	20-2673	Intake Seat Kit, 15/16" diameter (includes seat, ball & o-ring)
105-445	9-183	Intake Ball (stainless steel)
Miscellaneous Fluid Section Repair Parts
107-079	15-2278	Teflon O-Ring, intake seat
108-526	15-1498	Teflon O-Ring, at top & bottom of cylinder
111-457	15-2861	O-Ring, fluid section outlet
114-054	0-2284	O-Ring, bottom of cylinder
118-503	52-2658	Wiper, piston valve
119-676	- - -	Retaining Ring, attach pin
119-790	0-3093	O-Ring, fluid section outlet
15C-785	- - -	Intake Housing
15C-997	10-2661	Backup Washer, piston valve
15E-802	- - -	Fitting, quick disconnect, fluid section outlet
15F-109	- - -	Attach Pin
179-810	17-2422	Dust Plug, upper packing nut
192-624	- - -	Ball Guide, intake
192-714	- - -	Spacer, throat
193-046	- - -	Upper Packing Nut & Wet Cup
Dump Valves, Prime/Spray Valves, Pressure Release Valves, and Components
Complete Assembly
235-014	20-2324	Dump Valve Repair Kit, 1/4-turn valve with pin through handle
239-914	20-2806	Dump Valve Repair Kit with solvent resistant o-ring
Components
111-600	19-2807	Grooved pin (for use with standard handle 187-625)
111-699	- - -	Replaced by 277-364
112-319	0-2431	O-Ring, fluoroelastomer, solvent resistant (optional)
118-948	6-2683	Backup Split Ring, Teflon
15C-780	- - -	Handle, dump valve, 1-5/8" diameter (optional)
15C-972	19-3252	Grooved Pin, long (use with drian valve handle 15C-780)
15E-022	58-2317	Seat, carbide
168-110	0-1104	O-Ring, viton (standard)
187-615	- - -	Replaced by 15E-022
187-625	- - -	Handle, dump valve, standard 1-1/8" diameter
224-807	- - -	Base, dump valve
277-364	20-2865	Gasket, seat (contains (1) each loose-fit & force-fit styles)
Inlet Filters, Suction Hoses/Tubes, Drain Hoses, and Components
For Lo-Boy models:
287-631	- - -	LoBoy Suction Kit - inlet & drain hose sets
- - - - - - - - - - - - - -
189-920	14-2179	Inlet Filter, 1" NPT(f) thread, 8 mesh, stainless steel, single screen
241-920	- - -	Deflector / Diffuser, drain hose
287-537	- - -	Suction Hose Assembly, 1" NPT
287-654	- - -	Drain Hose Assembly
For Hi-Boy models:
118-494	0-2657	O-Ring, intake tube
15E-807	- - -	Intake Tube, 1" NPT
189-920	14-2179	Inlet Filter, 1" NPT(f) thread, 8 mesh, stainless steel, single screen
241-920	- - -	Deflector / Diffuser, drain hose
244-240	- - -	Drain Hose Assembly
Outlet Filter Assembly, Filter Elements & Components
Complete Assembly
287-517	- - -	Outlet Manifold Filter Assembly with 245-103 valve
Components
117-285	15-2739	O-Ring, fluid outlet filter
15C-765	- - -	Cap, outlet filter
15C-766	- - -	Support / Diffusion Tube, fluid outlet filter
15D-541	- - -	O-Ring, outlet filter plug
15E-284	- - -	Housing, outlet filter
244-067	14-2695	Outlet Filter Element, 60 Mesh, long black plastic frame
244-068	14-2696	Outlet Filter Element, 100 Mesh, long blue plastic frame
244-069	14-2697	Outlet Filter Element, 200 mesh, long red plastic frame
244-071	14-2694	Outlet Filter Element, 30 Mesh, long gray plastic frame
Miscellaneous Parts & Accessories
111-457	15-2861	O-Ring, pressure transducer
243-222	- - -	Pressure Transducer, electronic
287-419	- - -	Pressure Return Hose
287-471	- - -	Connecting Rod
Graco Instruction Manuals
310-893 E	GMax II 3900, 5900, 5900HD 7900 Airless Sprayers
310-894 B	Displacement Pumps GMax II 3900, 5900, 7900
Click Pictures to Enlarge = = = = = = = = = = = = = = = =
Before ordering any repair parts or attempting any maintenance, carefully read all instructions and warnings and verify part numbers required as specified in the OEM manuals that came with your particular unit. This reference was generated on 01/02/2022.  Part numbers on this reference were last modified on 03/27/2018. Copyright © 2022 by Bedford Precision Parts LLC

Repair Parts for Graco GMax II 3900 248-212 248212 240-518 240518 244-216 244216 248-206 248206 240-521 240521Repair Parts for Graco GMax II 3900 248-209 248209 287-551 287551 239-932 239932 248-502 248502 287-877 287877Repair Parts for Graco GMax II 3900 105-444 105444 239-922 239922 105-445 105445 107-079 107079 108-526 108526Repair Parts for Graco GMax II 3900 111-457 111457 114-054 114054 118-503 118503 119-676 119676 119-790 119790Repair Parts for Graco GMax II 3900 15C-785 15C785 15C-997 15C997 15E-802 15E802 15F-109 15F109 179-810 179810Repair Parts for Graco GMax II 3900 192-624 192624 192-714 192714 193-046 193046 235-014 235014 239-914 239914Repair Parts for Graco GMax II 3900 111-600 111600 111-699 111699 112-319 112319 118-948 118948 15C-780 15C780Repair Parts for Graco GMax II 3900 15C-972 15C972 15E-022 15E022 168-110 168110 187-615 187615 187-625 187625Repair Parts for Graco GMax II 3900 224-807 224807 277-364 277364 287-631 287631 line2 189-920 189920 241-920Repair Parts for Graco GMax II 3900 241920 287-537 287537 287-654 287654 118-494 118494 15E-807 15E807 189-920Repair Parts for Graco GMax II 3900 189920 241-920 241920 244-240 244240 287-517 287517 117-285 117285 15C-765Repair Parts for Graco GMax II 3900 15C765 15C-766 15C766 15D-541 15D541 15E-284 15E284 244-067 244067 244-068Repair Parts for Graco GMax II 3900 244068 244-069 244069 244-071 244071 111-457 111457 243-222 243222 287-419Repair Parts for Graco GMax II 3900 287419 287-471 287471 310-893 310893 E 310-894 310894 B