Water Pump Shaft/Seal Removal; Water Pump Shaft/Seal Inspection (Disassembled Engine); Water Pump Shaft/Seal Installation (Disassembled Engine) - TGB EST 1000 Service Manual

5-1. ENGINE ASSEMBLY

Water Pump Shaft/Seal Removal

(Disassembled Engine)
1. Remove the water pump housing and
impeller.
2. Remove the circlip retaining the driven gear
on water pump shaft.
3. Remove water pump driven gear, needle pin
and thrust washer.
4. Using soft hammer; push out water pump
shaft with inner portion of rotary seal from
inside of crankcase ACG side.
5. To remove outer part of rotary seal, use an
expander special tool.
6. Install expander against outer part of rotary
seal and pull seal out.
NOTICE: When removing water pump shaft,
always replace rotary seal with water pump
shaft. Also replace oil in crankcase.
7. Remove oil seal from inside of crankcase
ACG side using a pusher tool.
NOTICE: Be careful not to damage the rotary
seal surface in crankcase.

Water Pump Shaft/Seal Inspection (Disassembled Engine)

▪ Inspect water pump gear for wear and damage on the snap mechanism to the needle pin. Replace if
damaged.
▪ Check water pump intermediate drive gear for wear or broken teeth. Replace if damaged.
NOTICE: Never use the circlip a second time. Always install a NEW one.

Water Pump Shaft/Seal Installation (Disassembled Engine)

For installation, reverse the removal procedure.
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