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Page Title: PARTS LIST FOR MODEL 31-116 AIR MOTOR DRIVE UNIT
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Figure 1. Model 31-116 air motor drive unit.
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Figure 2. Model 18 spray gun.

PARTS LIST FOR MODEL 31-116 AIR MOTOR DRIVE UNIT
PART
PART
NO.
DESCRIPTION
QTY.
NO.
DESCRIPTION
QTY.
20-354  27 Lockwasher ...................................
2
31-59
22 Worm Gear Assembly ...................
1
20-387  28 3/8-16 x 1" Hex Cap Screw . .........
2
31-60
33 Washer ......................................... .
1
20-537  34 1/4-20 x 3/4 Hex Cap Screw..........
4
31-62
18 Cover Assembly ............................
1
20-1067 2  Coupling, 1/2 Bore ........................
1
31-63
6  Overflow Cap.................................
1
20-1068 3  Rubber Spider................................
1
31-64
11 Gear Reducer Shaft .....................
1
20-1076 30 5/16-18 x 5/16 Soc. Hd. Set Screw
1
31-115  26 Gear Reducer Assembly ..............
1
20-1237 4  1/4-20 x 1/4 Soc. Hd. Set Screw.. .
2
37-85*
40 Plug Gasket ..................................
1
20-1671 31 Drive Pin, No. "O" x 1/8 ................
2
37-89
43 Rotor & Shaft.................................
1
20-1754 10 Bearing ..........................................
1
37-90*
38 Seal ..............................................
1
20-1755 15 Bearing ..........................................
1
37-91
39 Bearing .........................................
2
20-1756 24 Oil Seal ..........................................
2
37-92*
41 Rotor Vane .................................. ..
4
20-1757 16 Oil Seal .. .......................................
1
37-96
42 Bearing Plug................................. .
1
20-1758 14 Woodruff Key .................................
1
37-253  44 Dead End Plate ............................
1
20-1759 1  Flexible Coupling Assembly...........
1
37-254  46 Drive End Plate ............................
1
20-1760 5  Coupling, 12 M. M..........................
1
37-255  36 Air Motor Housing..........................
1
20-1769 19 Bearing ..........................................
1
37-256  53 Air Motor Screw.............................
2
20-4987 7  No. 10-24 x 1/2 Phillips Hd.M Screw 10
37-257  54 Air Motor Cover .............................
1
31-46
25 Gear Reducer Housing ..................
1
37-258*  52 Air Motor Felt................................ .
1
31-47
20 Gear Reducer Cover .....................
1
37-259  37 End Plate Screw............................
12
31-48
9  Dead End Carrier...........................
1
37-260  35 Air Motor Assembly .......................
1
31-49
17 Driven End Carrier ........................
1
37-337*  45 End Plate Gasket .......................... ..
2
31-51
13 Worm Gear ....................................
1
57-13
56 D.M. Nipple.................................. ..
1
31-54
23 Bearing ..........................................
1
73-8
48 Needle Valve .................................
1
31-55
21 Cover Gasket ................................
1
73-9
49 Packing..........................................
1
31-56
8  Carrier Gasket ..............................
2
73-10
50 Packing Nut ..................................
1
31-57
29 Agitator Coupling ..........................
1
73-13
51 Valve Body ...................................
1
31-58
12 Spacer ...........................................
1
73-59
47 Air Adjusting Valve . ......................
1
83-1270 55 Air Hose Assembly .......................
1
* Also available in Repair Kit G-183. Please order
83-2450 32 Name Plate....................................
1
separately.
9

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