Centinel System – Repair Manual – 008-102   Water Pump Cartridge

WARNING  Do not remove the pressure cap from a hot engine. Wait until the coolant temperature is below 50°C [120°F] before removing the pressure cap. Heated coolant spray or steam can cause personal injury.

WARNING  Coolant is toxic. Keep away from children and pets. If not reused, dispose of in accordance with local environmental regulations.

• Drain the cooling system. Refer to Procedure 008-018.
• Remove the water pump drive belt and tensioner. Refer to Procedure 008-080.
• Remove the refrigerant compressor drive belt. Refer to Procedure 009-052.

Remove the four water pump cartridge mounting capscrews.

Remove the water pump cartridge and o-ring.

Discard the o-ring.

Clean the water pump cartridge.

Inspect the water pump cartridge for cracks.

Inspect the water pump weep hole for indication of leaks.

Stains around the weep hole are normal and will be expected and is not considered a warrantable failure. A warrantable water pump failure is defined as stains around the weep hole which form a drip or accumulation of liquid.

Inspect the cast iron impeller for cracks, pitting and other damage.

If the indication of a steady flow of coolant is observed, replace the water pump cartridge with a new or rebuilt unit.

CAUTION  Do not use petroleum based lubricant. Petroleum based lubricants will cause the o-ring to crack or swell, leading to a coolant leak.

Install the new o-ring seal on the cartridge.

Install the cartridge in the water pump housing.

Install the four water pump cartridge capscrews

Tighten the capscrews.

• Install the refrigerant compressor drive belt. Refer to Procedure 009-052.
• Install the water pump drive belt and tensioner. Refer to Procedure 008-080.
• Fill the cooling system. Refer to Procedure 008-018.
• Operate the engine and check for leaks.