Valves; Thermostat Assembly; Water Pump Assembly - Kubota D1503-M Workshop Manual

03-M-E3B, 03-M-DI-E3B, 03-M-E3BG WSM

Valves

1. Remove the valve caps (3).
2. Remove the valve spring collet (4), pushing the valve spring
retainer (5) by valve spring replacer (1).
3. Remove the valve spring retainer (5), valve spring (6) and valve
stem seal (2).
4. Remove the valve (7).
(When reassembling)
• Wash the valve stem and valve guide hole, and apply engine oil
sufficiently.
• After installing the valve spring collets (4), lightly tap the stem to
assure proper fit with a plastic hammer.
IMPORTANT
• Do not change the combination of valve and valve guide.
(1) Valve Spring Replacer
(2) Valve Stem Seal
(3) Valve Cap
(4) Valve Spring Collet

Thermostat Assembly

1. Remove the thermostat cover mounting screws, and remove the
thermostat cover (1).
2. Remove the thermostat assembly (3).
(When reassembling)
• Replace the thermostat cover gasket (2) with new one.
• Apply a liquid gasket (Three Bond 1215 or equivalent) to the
water flange 1 (4) and flange 2 (5)
(1) Thermostat Cover
(2) Thermostat Cover Gasket
(3) Thermostat Assembly
Water Pump Assembly (If necessary)
1. Remove the water pump assembly (1) from the gear case.
(When reassembling)
• Replace the gasket (2) with new one.

(1) Water Pump Assembly

S-53
DIESEL ENGINE
(5) Valve Spring Retainer
(6) Valve Spring
(7) Valve
W1022102
(4) Water Flange 1
(5) Water Flange 2
W1105115
(2) Gasket
W1051957
KiSC issued 07, 2008 A