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TRACTOR - - MODEL NUMBER 917.272070
KOHLER ENGINE-MODEL NUMBER CV490, TYPE NUMBER 27505
CYLINDER HEAD/VALVE/BREATHER
CRANKCASE
KEY PART KEY PART
NO. NO. DESCRIPTION NO. NO. DESCRIPTION
1 25-351-01-S Lifter, valve (2) 1 12-032-03-S Seal, crankshaft
2 12-755-94-S Kit, cylinder head (Includes 2 Block, cylinder
3-17, Gaskets 12 041 01-S (Use Shor_ Block 12 522
(Qty. 2), 12 041 02-S, & 12 49)
041 03-S) 3 12-445-02-S Strap, lifting
3 12-411-03-S Rod, push (2) 4 M-839025-S Screw. hex. flange
4 12-041-10-S Gasket, cygn_3erhead M8x1.25x25
5 12-017-01-S Valve, intake (Std.) 5 24-380-13-S Dowel, locating (4)
12-017-02-S Valve, intake (.25) 6 12-755-49-S Kit, camshaft (Includes 7,8)
5 12-016-01-S VaJve. exhaust (Std,) 7 12-089-31-S Spring, actuating
18-016-02-S Valve, exhaust (.25) 8 12-422-08-S Shim, camshaft (A,R.) blue
7 25-139-60-S Plug, allen hd. pipe 1/8" 12-422-09-S Shim, camshaft _A.R.) red
8 12-318-36-S Cylinder Head 12_422-10-S Shim, camshaft (A,R.)
9 25-186-01-S Arm, rocker (2) yellow
10 12-599-03-S Pivot, rocker arm (2) 12-422-11-S Shim, camshaft (A,R.) green
11 M-640034-S Screw, hex. ftange 12-422-12-S Shim, camshaft (A.R.) gray
M6xl.0x34 (2) 12-422-13-S Shim, camshaft (A,R.) black
12 12-089-01-S Spring, valve (2) 12-422-07-S Shim, camshaft (A,R.) white
13 12-173-01-S Cap, valve spring (2) 9 12-144-28-S Shaft, balance
14 12-755-03-S Kit, retainer (2) 10 12-874-07-S Piston w/Ring Set (Std.)
15 12-465-05-S Washer, plain 13/32" (_nc_udeS11,12)
16 12-112-13-S Spacer, head bolt exhaust 12-874-11-S Piston w/Ring Set (.08)
port 12-874-08-S Piston w/Ring Set (.25)
17 12-086-15-S Screw, hex. flange 12-874-o9-S Piston w/Ring Set (.50)
M10x1.5x81 (5) 11 12 018 02-S Retainer, piston pin (2)
18 25-237-14-S Clamp, hose (2) 12 12-108-07-S Ring Set (Std.)
19 12-326-03-S Hose, breather 12-108-08-S Ring Set (.25)
20 M-645020-S Screw, hex. flange 12-108-09-S Ring Set (.50)
M6xl.0x20 (5) 13 12-067-11-S Connecting Rod (Std,)
21 12-096-07-S Cover, valve w/nipple 12-O67-06-S Conr_ecting Rod (,25)
22 M-545010-S Screw, hex. flange 14 12-380-01-S Pin, governor regulating
M5x0.8xl0 15 12-043-05-S Gear, governor
23 12-018-01-S Retainer, breather reed 16 M-631005-S Washer, plain 6 mm
24 12-402-02-S Reed, breather 17 12-144-02-S Shaft, governor gear
18 52-139-09-S Plug, cup
19 12-755-E4-S Kit, gov, cross shaft w/clip
(Includes 23)
20 X-25_102-S Washer, plain 1/4"
21 12-032-01-S Seat. governor crOss shaft
22 M-631015-S Washer, plain 6 mm
23 12-t54-05-S Clip, hitch pin
NOTE: All component dimensions given in U.S.
inches 1 inch = 254 mm
49