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REPLACING WATER PUMP SEAL
from Briggs & Stratton Vanguard Twin Cylinder OHV Liquid-Cooled Engines Repair Manual - PDF DOWNLOAD
VanguardTM Twin-Cylinder OHV Liquid-Cooled Engine Section 4 - Engine Overhaul
a. Torque screw to 70 in. lbs. (8.0 Nm).
Fig. 95
Check Breather
The engine utilizes a breather valve to control and maintain a vacuum in the crankcase. The breather vents crankcase vapors through the air cleaner. The reed valve is spring-loaded and must make a complete seal around the vent holes in breather body, Fig. 96. Check to see that reed valve is not deformed. DO NOT USE FORCE ON REED VALVE.
Fig. 96
The water pump seal may be replaced without removing the crankcase cover from the engine. The water pump housing and water pump impeller must be removed. If any evidence of coolant is observed in the oil, this indicates that the oil seal behind the water pump seal is leaking. To replace the oil seal, the crankcase cover must be removed. To remove the oil seal, use the same tools and procedure for removing the water pump seal. The following tools are required to remove the water pump seal, Fig. 97: • Puller Nut #19140 • Puller Stud #19398 • Support Driver #19394 • Pilot Nut #19395 • 1/2” Flat Washer
• Nut #94814
Fig. 97
Removing Water Pump Seal
1. Assemble puller nut to puller stud with chamfered side down as shown in Fig. 97. 2. Insert nut and stud through water pump seal at a slight angle as far as it will go, Fig. 98.
