Page 6-2 MAXX 450D/470D/Diesel
HydraMaster Corporation10/24/02
T
he next few pages explain how to disassemble and inspect all easily serviceable
parts of the pump.
Do not disassemble the hydraulic end unless you are a skilled mechanic.
For assistance, contact HydraMaster (425-775-7275) or the distributor in your area.
1. Servicing the Valves (See illustrations above.)
A. Remove the hex valve plugs (top-discharge, bottom-inlet).
B. Unthread the valve plug and examine the o-ring under the plug for cuts
or distortion. Replace it if it is worn.
Lubricate new o-rings before installing.
C. Grasp the valve retainer by the tab at the top with needle-nose pliers,
then remove the o-ring at the bottom of the valve chamber.
D. Inspect all valve parts for pitting, gouges, or wear. If wear is excessive,
replace valve assembly.
E. Reinstall valve assemblies:
1. Using a clean towel, clean the valve chamber.
2. Install the o-ring into the high pressure manifold.
3. Install the valve assemblies into the high pressure manifold
(the metal side of the valve faces the manifold).
4. Replace the o-ring on the hex valve plug.
5. Torque the plug to 72 foot pounds.
Service
CAUTION
!
To Next Page
Loading...