6
System Maintenance: Pump Cam and Bearing
47
SYSTEM MAINTENANCE
PUMP CAM AND BEARING
Chemicals may seep into the bearing cavity and from the underside of the pump housing. The pump cam and
bearing housing should be cleaned and inspected periodically to prevent maintenance issues. Replace the seals
and piston after approximately 400 hours of pump operation.
FIGURE 3. Pump Head and Motor Separation
1. Loosen the four socket head screws holding the pump head to the motor assembly.
2. Remove pump from motor and clean surfaces of cam and bearing.
3. Examine the sealed bearing. If the bearing does not turn freely or smoothly, replace the bearing.
4. Apply a heavy coating of automotive grease to the area where the piston engages the cam bearing and
reassemble pump to motor.
PISTON SEAL REPLACEMENT
NOTE:
New piston seals are supplied in the Pump Seal Kit (P/N 117-0171-657, see Table 2 on page 49)
available through a local Raven dealer. Complete replacement kits (P/N 063-0172-924) for both 1-40
Oz./min. and 5-200 Oz./min. pumps are available through a local Raven dealer.
CAUTION
Chemical residue or build up may be present on
internal pump components. Wear gloves when
servicing internal pump assemblies.
CAUTION
Chemical residue or build up may be present on
internal pump components. Wear gloves when
servicing internal pump assemblies.
Torque to
41 - 46 In-lbs.
[4.6 - 5.2 N-m]
4x
Torque to
75 In-lbs. [8.5 N-m]
4x -
2x -
