Water Pump Service - Toro Reelmaster 5100-D Service Manual

Water Pump Service

1. Drain the cooling system.
2. Remove the drive belt from the water pump and
alternator.
3. Loosen the hose clamp and disconnect the hose from
the water pump.
4. Remove the water pump (Fig. 32).
5. Check the water pump for cracks or leaks. Rotate the
water pump shaft by hand. If the bearings do not rotate
smoothly, or are noisy replace the water pump with a
new water pump. There are no replaceable parts in the
water pump.
6. Install the water pump and a new gasket onto the
cylinder block.
7. Check for damaged hoses or damaged hose clamps.
Replace as required. Install the hoses on the water
pump and tighten the hose clamps.
8. Install the alternator / water pump drive belt.
9. Insert a pry bar between the alternator and engine
and pry out alternator. Apply only enough pressure to
get the correct belt tension.
10. Hold the alternator in position after you get proper
belt tension and tighten the alternator brace bolt.
Tighten alternator the support bolt. For proper tension,
belt should deflect 3/8 to 1/2 in. when (22 lb.) of force is
applied midway between alternator and crankshaft pul ­
leys.
11. Fill the cooling system with a 50/50 solution of clean,
soft water and ethylene glycol antifreeze.
External Engine Component Repair Page 3 - 30
Figure 32
1. Water pump
2. Gasket
®
Reelmaster 223-D/5100-D