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REPAIR PARTS
SEARS 18TWIN HYDRO GARDEN TRACTOR--MODEL
NO.
917.257070
ONAN
ENGINE-·MODEL NO. B48M-GA018/3475A
PISTON.
ROD,
CAMSHAFT, CRANKSHAFT
AND FLYWHEEL
GROUP
3
KEY
PART
DESCRIPTION
NO.
NO.
150-0078
Retaining Ring
150-1519
Hub
150-1520
Cup
510-0015
Flyball
150-1257
Spacer
150-0077
Plate
4
1
1
2
3
4
5
6
7
8
9
105-0332
Gear
(Includes
Spacer and Plate)
10
11
12
13
14
15
105-0004
Thrust
Washer
150-0075
Center
Pin
515-0001
Camshaft Gear Key
105-0402
Camshaft (Includes Center Pin)
870-0302
Hex Nut, Locking (5/16 ·
24
)
CONNECTING
ROD (Inc. Key No's. 12 and
14)
114-0257
Standard
114-0257-10 .010"
Undersize
114-0257-20
.020"
Undersize
114-0257-30
.030"
Undersize
114-0240
Bolt {Special)
PISTON AND PIN
(Inc.
Key No's 16 and 17)
112-0151
Standard
112-0151-05 .005" Oversize
112-0151 -10
.010" Oversize
112-01
51-20
.020" Oversize
112-0151
-30
.030" Oversize
112-0151-40 .040"
Oversize
23
.
36
.
11
21
20
19
18
KEY
PART
DESCRIPTION
NO.
NO
.
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
112-0122
Piston Pin
518-0311
Retaining Ring
RING SET, PISTON
113-0189
Standard
113-0189-05 .005" Oversize
113-0189-10 .010"
Oversize
113-0189-20 .020" Oversize
113-0189-30 .030" Oversize
113-0189-40
.040" Oversize
104-0996
Crankshaft
515-0001
Key, Crankshaft
Gear
515-0227
Key, Flywheel
104-0032
Gear
104-0043
Gear Retaining Washer
518-0014
Re
taining
Ring
134-3506
Flywheel
(Inc. Ring Gear
and
Stator)
104-0779
Ring
Gear
134-3508
Guard
815-0400
Machine Screen,
Truss Head
526-0017
Flat Washer
(1
5/32"
I.D. x
1
•
1/4"
O.D.
x 1/4"
Thick)
850-0055
Lockwasher
(7 /16
11
)
104-0170
Cap
Screw
{7/16
·
14
x 4")
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