TRUCK SERVICE MANUAL
ENGINE
Cooling System
The cooling system consists of engine water pump, fan
Group 8
hub, thermostats, heat exchanger, sea or raw water pump
and coolers.
1.
Pulley
5.
Snap Ring
9. Rear Oil Seal
13. Ceramic Seat and
2.
Snap Ring
6.
Bearing
Seal
3.
Sleeve
7.
Bearing
10. Body
14. Shaft
4.
Front Oil Seal
8.
Bearing Spacer
11. Carbon Face Seal
12. Impeller
Fig. 8-1, (N10843). Water pump exploded view (855 C.I.D Series)
ST-709 Puller
Service Tools (Or Equivalent) Required
ST-1154
Seal Driving Mandrel
ServiceTool
ST-1161
Seal Mandrel
Tool Number Name
ST-647
Puller
ST-1114
Bearing Disassembly Tool
WATER PUMP
ST-1159
Seal-Wear Sleeve Driven
Two basic water pumps are used on 855
C.I.D.
ST-1191
Seal Mandrel
engines, they are the eccentric or idler pulley belt
ST-1225
Seal Mandrel (Thermostat)
adjustment pumps as shown in Fig. 8-1 or N.T.A. Series
with idler belt adjustment as shown in Fig. 8-2. Remove
Desirable (Or Equivalent) Service Tools
idler pulley assembly and drain lubricant where
applicable before pump disassembly. Water pumps are
ST-658
Mandrel
to be lubricated with grease meeting specifications in
ST-659
Mandrel-Seal Driven
Group 18 when reassembled.
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