Service Bulletin

Customer Service Bulletin Vehicles 08-20 Page 3 of 7
Hardened Sprayer Pump Heads Multi Pro 5800/1750/Workman January 17, 2017
Instructions
Situation:
The original Hardi pump heads may wear prematurely. Replace them with the upgraded hardened
pump heads to increase the life of the pump. The new heads are gray in color and are a different
design than the older heads they are replacing.
Note: Inspect the condition of the diaphragms and the inlet and outlet valves of each cylinder
while the pump heads are removed. If the diaphragms and/or valves are worn, rebuild
the pump using rebuild kit P/N 120-0796.
Instructions:
1. Remove the pump from the machine. Refer to the appropriate service manual for step-by-
step instruction on this procedure, based on your specific model.
Figure 1
Vehicles #08-20