4-10
Water Pump
REMOVING/DISASSEMBLING
1. Drain the coolant.
2. Remove the four cap screws securing the water
pump case. Account for the gasket and two
alignment pins.
3. Remove the impeller, washer, and seal washer.
4. Remove the mechanical seal using the following
procedure.
A. Tap the tip of a small sheet metal screw into
the inner-metal edge of the seal.
B. Grip the screw with a pair of vise-grip pliers
and pull the seal out. Account for the pump
drive seal.
CLEANING AND INSPECTING
NOTE: Whenever a part is worn excessively,
cracked, or damaged in any way, replacement is
necessary.
1. Clean all pump components in parts-cleaning
solvent.
2. Inspect the mechanical seal and pump drive seal
for damage.
NOTE: If the mechanical seal and/or pump drive
seal are damaged, they must be replaced as a set.
3. Inspect the impeller for corrosion or damage.
ASSEMBLING/INSTALLING
NOTE: Treat seals and O-rings with clean anti-
freeze for initial lubrication.
1. Press the seal washer into the impeller by hand.
2. Install the water pump drive seal; then drive the
mechanical seal into the crankcase cover using
an appropriate seal driver.
3. Install the impeller with seal washer onto the
water pump shaft and tighten securely.
4. Place the water pump case into position and
secure with the four cap screws.
5. Fill the cooling system with the recommended
amount of antifreeze.
NOTE: While the cooling system is being filled,
air pockets may develop; therefore, run the engine
for five minutes after the initial fill, shut the engine
off, and then fill the cooling system.
6. Check the entire cooling system for leakage.
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Summary of Contents for DVX 250 2007
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