Maintenance
MAIntenAnCe sChedule
Maintenance Schedule
Action needed
Daily
• Check water inlet screen and
filter.
• Check engine oil levels. Fill as
necessary.
• Check gasoline level. Fill as
necessary.
After first 5 hours of
operation
• Change engine break-in oil.
Use 10W-30 automotive
detergent oil. See your
Honda Owner’s manual for
specific information.
Every 25 hours of operation
• Change oil if operating under
heavy load or high ambient
temperature.
• Clean or replace paper air
cleaner cartridge. Tap gently
to remove dirt.
Every 50 hours of operation
• Change oil.
• Replace spark plug.
Each 100 hours of operation
or every 3 months
• Replace paper air cleaner
cartridge.
• Change engine oil.
15
Models MX5223, MX5333 and MX5433
www.maxustools.com
Observe regular maintenance intervals to ensure maximum
performance and life from the pressure washer. Refer to the
schedule for recommended maintenance. If you operate the
pressure washer in dusty conditions, perform maintenance
checks more often.
engIne OIl ChAngIng InstruCtIOns
Before tipping the engine or equipment to drain
oil, drain fuel from the fuel tank.
NOTE: Change oil while the engine is cool.
1. Disconnect the spark plug wire from the spark plug.
2. Locate and remove the engine oil drain plug (See Figure 22).
3. Drain old oil.
4. Replace the drain plug and set the unit upright.
5. Refill the unit with new oil of a recommended type and
quantity. Fill the unit to the bottom edge of the oil fill neck.
PuMP OIl CheCkIng / ChAngIng InstruCtIOns
Please refer to provided Pump Specification page provided with
your Pressure Washer for details.
Figure 22 - Oil drain and fill locations
Oil Drain
Oil Fill
teChnICAl And COnsuMer InFOrMAtIOn
Horizontal Oriented Pressure Washers
Engine Oil Type
SAE 10W-30
(See Honda’s Owner Manual)
Engine Oil Capacity
Honda GX160
20 fl. oz.
Honda GX270
37 fl. oz.
Honda GX390
37 fl. oz.
Engine Fuel Capacity
Honda GX160
3.3 US quarts (3.1 L)
Honda GX270
5.6 US quarts (5.3 L)
Honda GX390
6.4 US quarts (6.1 L)
Pump Oil Type
CAT pump oil
Pump Oil Capacity
CAT Pumps
3DNX25
8.5 fl. oz.
3SPX30
10.15 fl. oz.
66DX35
18 fl. oz.
Pump Detergent Suction
Water to detergent ratio
10 to 1 (10% detergent)
Water Supply Requirements
Minimum inlet pressure
20 psi
Maximum inlet pressure
100 psi
Maximum inlet
temperature
100° F
Minimum inlet flow rate
5 gpm
Inlet garden hose size
5/8 inch I.D.
Maximum inlet garden
hose length
50 feet
