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77A Angle Grinder, Sander and Polisher Parts List
Item Part Description Part Number Item Part Description Part Number
1 Throttle Handle Assembly 77H-A160 43B Nameplate Screw (4) BN403-302
2 Throttle Valve Assembly 88V60-A302 * Warning Label
† • 3 Seal (2) C321-606 for Grinders ending in -EU EU-99
4 Inlet Bushing 77H-38 for all other Grinders WARNING-4-99
† • 5 Inlet Bushing Screen 834-61 for Sanders and Polishers ending in -EU EU-99
† 6 Throttle Valve Spring 77H-262 for all other Sanders and Grinders WARNING-5-99
7 Oil Chamber Plug R2-227 44 Grease Fitting (2) 130SR-188
8 Throttle Valve Seat Support Assembly 77H-A303 45 Mounting Plate Pin 77A-31
9 Valve Seat Screw PS3-83 • 46 Upper Bearing Spring Washer 4U-278
10 Valve Seat Lock Washer H54U-352 • 47 Upper Arbor Bearing WWA100-97
11 Valve Seat Washer 99V-155 48 Bevel Gear Nut 77A-578
† • 12 Valve Seat R4-159A 49 Bevel Gear Spacer 77A-25
† 13 Valve Support Seal (2) SPP101-743 50 Arbor Lower Bearing Assembly 77A-A593
14 Oiler Feeder Plug 77H-75 51 Lower Arbor Spring Washer 77A-307
15 Throttle Valve Seat Support Retainer 77H-518 52 Sander Arbor Retaining Plate 77A-55
16 Throttle Lever Pin MR-100 53 Screw Lock Washer (6) 88H60-67
17 Throttle Lever Assembly 77H-A400 54 Guard Screw or Retaining Plate Screw (6) 77H-638
18 Lever Lock Pin R100B-120 55 Sander Arbor 77A-204-P10
19 Lever Lock Spring DG120-405 56 Sanding Pad Assembly
20 Lever Lock DG120-402 with 5” Sanding Pad 77A-AM825-5
21 Coupling Nut 77H-282 with 7” Sanding Pad (medium) 77A-AM825-7
‡ 22 Controller Assembly (Consists of Controller with 7” Sanding Pad (rm) 77A-BM825-7
and Rear End Plate Assembly) with 9” Sanding Pad 77A-AM825-9
for 77A45W109 77H90-A524RH 57 Pad Mounting Kit 77A-826
for 77A60W107, 77A60P107,
77H120-A524RH
58 Wool Bonnet (for 77A25F107) P500-850
77A60P107M, 77A60P109 and 59 Depressed Center Wheel Guard
77A60P109M for 7” diameter wheels 77A-106-7
23
Rear End Plate Assembly (consists
77H-A12
for 9” diameter wheels 77A-106-9
of rear end plate, rotor bearing and 60 Depressed Center Wheel Arbor 77A-4-B10
required spacers) 61 Autobalancer Assembly 99V60-A713
† • 24 Rear End Plate Gasket 77H-739
*
Autobalancer Wrench (7/8” single end;
88V60-169
25 Cylinder 77H-3 open-end wrench)
26 Rotor 77H-53RH
63
Depressed Center Wheel Spacer (2 for all
99V-286
† • 27 Vane Packet (set of 4 Vanes) 77H-42-4 Type 27 Mounted Wheels)
• 28 Front End Plate 77H-11
65
Wheel Retaining Screw (for all Type 27 and
99V60-219
29 Front Rotor Bearing 77H-24 28 Wheels)
30 Cylinder Dowel 77H-98
66
Depressed Center Wheel Flange (for Type 27 &
99V60-386
31 Bevel Pinion Driver 28 Plain Hole Wheels)
for 77A25F107 77A-8
67
Depressed Center Wheel Nut
99V85-186
for all others 77A-7 (for Type 27 and 28 Plain Hole Wheels)
32 Internal Gear 77H-406 * Depressed Center Wheel Nut Spanner Wrench D32-26
33 Bevel Pinion Driver Bearing WFS182-97 * Wheel Flange Wrench (for all Grinders) 7RAQT4-254
34 Planet Gear Shaft (2) G700-191
68
Depressed Center Wheel Flange (for
99V60-386-M
35 Rotor Pinion 77H-17 77A60P107M, 77A60P109M and 77A75P107M
36 Planet Gear Assembly (2) 77H-A10 with Type 27 and Type 28 Plain Hole
37 Planet Gear Bearing (one for each gear) G700-654 Depressed Center Wheels)
38 Thrust Spacer 77A-104 70 Dead Handle 88V60-48
39 Bevel Pinion Bearing Assembly 77A-A510 72 Nameplate 66H-301
40
Matched Gear Set (Bevel Gear and Pinion not
77A-A552
73 Nameplate Screw (4) BN403-302
sold separately) * Bearing Clamp Assembly 77H-A952
41 Motor Spacer 77E-208-H8 * Controller Wrench 77H-950
42 Arbor Coupling 66H-304 * Throttle Valve Seat Support Retainer Pliers 77H-154
‡ 43 Angle Arbor Housing * Coupling Nut Wrench 77H-281
for models ending in -EU 77A-EU-A40-P10 * 1/2” Pipe Tap Inlet Bushing 88V60-38
for all other models 77A-A40-P10 * Vibra-Tite®** 0.6 cc 5R-VT06
43A Nameplate Kit * Adhesive Kit 77H-KVLT
for models ending in -EU 77A-EU-K301 Tune-up Kit includes illustrated parts:
77H77A-TK3
for all other models 77A-K301 (3 [2], 5, 6, 12, 13 [2], 24 and 27)
* Not Illustrated.
• To keep downtime to a minimum, it is desirable to have on hand certain repair parts. We recommend that you stock one (pair or set) of each
part indicated by a bullet (•) for every four tools in service.
‡ Whenever a new Angle Arbor Housing is installed, select the correct Nameplate from the Nameplate Kit (43A) and attach it to the Housing
with the Nameplate screws (43B).
† Indicates Tune-up Kit part.
# Early models of these Grinders had Rotors and Controller Assemblies with left-hand threads. If you have a model with left-hand threads,
contact Ingersoll Rand when ordering replacement parts.
**Registered trademark of ND Industries.