Generac 005055-1 User Manual
GTH990
Engine Parts Manual
Model: 005055-1
17
15
18
21
22
14
13
12
7
8
24
3
27
29
28
32
19
23
6
5
65
64
63
62
61
60
59
58
52
51
50
49
48
47
9
43
57
1
42
41
38
37
36
35
34
33
39
3
77
40
2
77
26
10
4
34
25
11
30
20
76
16A
16B
16A
54
53
56
55
74
75
46
44
31
GTH990 OHVI SERIES ENGINE Model 005055-1
2
Model 005055-1 GTH990 OHVI SERIES ENGINE
ITEM PART NO. QTY. DESCRIPTION
1 0C57290SRV 1 ASSEMBLY, CRANKCASE HOUSING WITH
SLEEVE
2 0E9843 1 SEAL, 38 I.D. CRANKSHAFT FLYWHEEL
SIDE
3 090388 3 SCREW, HHTT M6-1.0 X 12 YC
4 0C5372 1 ASSEMBLY, BREATHER
5 0C3005 1 GASKET, BREATHER COVER
6 0E3372B 1 SEPARATOR, OIL BREATHER
7 0D8067A 1 ASSEMBLY, HEAD #1 G&S
8 071983 4 RETAINER, PISTON PIN 20
9 0C2981C 1 ROCKER, COVER W/BARB FITTING
10 045761A 4 STUD M8-1.25/10MM X 30 G5 ZINC
11 0E2950 2 PISTON, HC
12 0215330SRV 2 SET, PISTON RING 90MM
13 0E1466 2 PIN PISTON D20
14 0D4041 1 ASSEMBLY, CAMSHAFT & GEAR
15 0C2983 1 SHAFT, GOVERNOR
16A 0C2985A 2 ROLLER BEARING, GOVERNOR PLATE
16B 0C2985B 1 ROLLER BEARING, GOVERNOR
17 0D4042 1 ASSEMBLY, GOVERNOR GEAR
18 0A7811 1 SPOOL, GOVERNOR MACHINED
19 0C2977 1 GASKET, CRANK CASE
20 0C5943 1 SEAL, OIL PASSAGE
21 0E4357C 1 ASSEMBLY, CRANKSHAFT HORIZ L & G
22 0E3223 2 CONNECTING ROD
23 0D2157 2 SCREW, SHC M6-1.0 X 50 G8.8
24 0E6098 1 SCREEN, OIL PICKUP
25 0D4123A 1 ASSEMBLY, OIL PUMP
26 0E8152 1 O-RING .49 X .07 THICK
27 0C3011 2 COVER, OIL RELIEF
28 0C3009 2 SPRING, OIL RELIEF
29 0C3010 2 BALL, 1/2D OIL RELIEF
30 093873 2 WASHER, LOCK M6 RIBBED
31 0F5458 1 SCREW, PLASTITE HI-LOW #10
32 0C5998 1 CLAMP, OIL TUBE
33 0D1667 1 ARM, GOVERNOR
34 0C2991 2 E-RING, GOVERNOR ARM
35 0C2988 1 THRUST WASHER, GOVERNOR
36 0C2992 1 BUSHING, GOVERNOR LOWER
37 0F2664C 1 ASSEMBLY, DIPSTICK WITH HANDLE
ITEM PART NO. QTY. DESCRIPTION
38 0C5305 1 TUBE, DIPSTICK
39 0C3027 1 O-RING, OIL CLR 3/8 X 1/2
40 0E9842 1 SEAL, 42 I.D. CRANKSHAFT PTO SIDE
41 0C5731 1 ASSEMBLY, HOUSING COVER WITH
SLEEVE
42 0C3006 10 SCREW, HHFC M10-1.5 X 55
43 080318 8 SCREW HHFC M6-1.0 X 25
44 0930640SRV 1 ASSEMBLY, OIL FILL CAP
46 0D5269 1 ROCKER, COVER WITH OIL FILL
47 0C2979 2 GASKET, VALVE COVER
48 086515 8 KEEPER, VALVE SPRING
49 0D2274 4 RETAINER, VALVE SPRING
50 0D3867 4 SPRING, VALVE
51 078672 2 SEAL, VALVE STEM D7
52 0C5371 4 WASHER, VALVE SPRING
53 072694 4 STUD, ROCKER ARM PIVOT
54 0D3998 4 NUT HEX M8-1.0 G8 YEL CHR
55 0C3027 2 O-RING, 3/8" X 1/2"
56 0D5313 4 ROCKER ARM
57 0D6024 2 PLATE, PUSH ROD GUIDE
58 0C2976 12 SCREW HHFC M8-1.25 X 65
59 086516 2 VALVE, EXHAUST
60 0C2229 2 VALVE, INTAKE
61 083897 4 TAPPET, SOLID
62 0D8067B 1 ASSEMBLY, HEAD #2 G&S
63 0D9853D 4 PUSHROD, 147
64 0C2978 2 GASKET, HEAD
65 0D4788 2 PLUG,STD PIPE 3/8
66 0D40100ESV 1 KIT GASKET
67 0E29500SRV 1 KIT PISTON & RINGS
68 0D40120ESV 1 KIT BREATHER ASSEMBLY
69 0D40130SRV 1 KIT GOVERNOR ASSEMBLY
70 0D8675ASRV 1 KIT HEAD ASSEMBLY CYLINDER 1
71 0D8675BSRV 1 KIT HEAD ASSEMBLY CYLINDER 2
72 0D40150SRV 1 KIT OIL RELIEF
73 0D40160SRV 1 KIT GEAR COVER
74 0C4138 2 GASKET, EXHAUST PORT
75 0F0462 4 NUT, HEX W/TOOTH WSHR M8-1.25
76 0C2993 1 SEAL, GOVERNOR SHAFT
77 0D6147 5 SCREW, HHFC M6-1.0 X 10
3
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