HARBEN E Series, Operation & Maintenance Manual

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Routine Maintenance
Table 1 provides a basic guide to routine maintenance requirements for the various
components of the Jetter.
Warning: Maintenance should only be carried out with the engine turned off and when cold.
5.1. Maintenance Procedures
Prior to use / Daily /
After 8 hours running

Check inlet water filter element (Ref Para 5.2)

Check engine oil level on dip stick (Ref section 9)

Check engine coolant level (Ref section 9)

Visual check for hose damage/water leaks & for any
cracks in frame/chassis etc.

Check ignition and warning lamp operation

Check all lugnuts on bolts tires and torque to 90 lbs/ft
Weekly / every 24
hours running

Visually inspect Jetter for security checking for any
loose, damaged, or missing parts.

Check air filter cleanliness (Ref section 9)

Check engine fuel water trap for contamination (Ref
section 9)
3 months / 50 hours 
First service contact Harben Inc.
6 months / 150 hours 
Inspect tanks and fittings for leaks, thoroughly clean &
flush through (with hot water more than 158°F)

Tighten any loose joints

Grease the hydraulic hose reel bearing blocks

Check condition of 12volt start battery

Grease battery terminals for protection

Check alternator belt
Yearly / 300 hours 
Intermediate service of engine, gearbox and pump
required (Contact Harben Inc.)

Closely inspect the structural integrity of the framework
for signs of stress and cracking

Check hydraulic filter gauge. If it reads in the red replace
the filter and oil (Shell Tellus 22)

Carry out detailed inspection of pipes, hoses, and
fittings.

Dismantle, clean & lube the hydraulic diverter valve
2 yearly / 600 hours 
Major service of engine, gearbox and pump required
(Contact Harben Inc.)

Replace the pump inlet/delivery valves and diaphragms

Check wiring terminals/connections and continuity of
electrical earth.
Table 1 Recommended Routine Maintenance
For a detailed guide to pump maintenance and overhaul procedures refer to Section 7.
For routing engine maintenance please refer to the engine handbook supplied with the unit.