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4.1 MAINTENANCE SCHEDULE
USE THE FOLLOWING GUIDE WHEN CONSIDERING MAINTENANCE:
Always test units using a new H.P. jet correctly sized.
Before you start pulling pumps apart
, do obvious checks first:
o
Worn Jets
o
Air Leaks
o
Engine Speed (Not too low)
o
Power Supply (Not too low when using long leads on 240 Volt units)
o
Suction Filters (Blocked?)
o
Water supply volume (Not too low)
As a guide in normal use, consider the following:
- After replacing 10 H.P. Stainless Steel jets, it is time to replace the seals on the
pump using a Seal Kit.
- At the same time, also replace the seals on the By-Pass Valve using a By-Pass kit
- Do a whole pump changeover at 1,000 hours. (Con Rods, Big Ends & Crankshaft)
- Pistols, swivels & H.P Hose damage is usually uneconomical to repair. Replace
when necessary.
- By-Pass Valves will take 3-5 rebuilds before body wear becomes too much and
replacement is needed.
IMPORTANT MAINTENANCE TIPS:
4. MAINTENANCE
#
ACTION REQUIRED
DAILY
250 HOURS 500 HOURS
ANNUAL
1
Replace
H.P. Jet Nozzle
2
Check Water Filters - Clean or replace
3
Check Air Filter - Replace if required
4
Inspect for damage or leaks - and repair or
replace all HP components like gun, hose,
swivel, nozzle, by-pass valve, etc
5
Strip & Refurbish Hawk Pump:
- Replace Plunger Rod Oil Seals (3/pump)
- Replace Brass Valves (6/pump)
- Replace various seals (3/pump)
- Replace Ceramic Piston Plungers if
cracked or worn (3/pump)
When Required
6
Check Oil Level in Pump/Slave tank
7
Change
Pump Oil - SAE 15/40 or SAE 30
8
Check By-Pass valve function test - re-kit or
replace if required
9
Replace
Fuel Filter
10
Service Transmission - Use 80/90 Gear Box
Oil
INTERVALS
