Service Manual

Water Pump, Hose, Pipe and Thermostat Removal and Installation
1
2
3
5
6
4
7
8
9
10
11
12
13
14
Before disassembling:
1. Remove timing belt.
Before assembling:
2. Install timing belt.
10 – 13 Nm
(7 – 9 ft–lb)
20 – 30 Nm
(14 – 22 ft–lb)
10 – 12 Nm
(7 – 9 ft–lb)
10 – 13 Nm
(7 – 9 ft–lb)
12 – 15 Nm
(9 – 11 ft–lb)
8 – 10 Nm
(6 – 7 ft–lb)
2. Remove alternator.
1. Install alternator.
Figure 92
1. Water outlet fitting 6. O–ring 11. Water inlet pipe
2. Water outlet fitting gasket 7. Water hose 12. O–ring
3. Thermostat 8. W
ater hose 13. Water pump
4. Coolant temp. gauge sender 9. Water inlet fitting 14. W
ater pump gasket
5. Thermo valve 10. W
ater inlet fitting gasket
Disassemble and assemble parts as shown in illustra-
tion above. Also use the following instructions for specif-
ic points of disassembly, inspection and reassembly.
Water Pump Inspection
1. Check parts for cracks, damage or wear and replace
water pump assembly if necessary
.
2. Check bearing for damage, noisy operation or slug-
gish rotation and replace water pump assembly if
nec-
essary.
If coolant leaks from
hole, seal unit is faulty
Figure 93
3. Check seal for leaks and replace water pump if nec-
essary
.
4. Check for water leakage. If water leaks from hole,
seal unit is faulty
. Replace pump as an assembly.
Liquid Cooled
Gas Engine
Workman 3000/4000 Series
Page 3 – 55
Liquid Cooled Gas Engine