ALTRA Series Operator Manual
Periodic Maintenance
1. Check power cord for any breaks, separations, or cuts. Make sure the ground pin on the
connector is intact or the machine will be unsafe. Make sure the ground pin on all three
prongs on the twist lock connector are intact.
2. Check for plugged nozzles when using tools. If streaking occurs during cleaning, a plugged
nozzle may be the cause. A plugged or partially plugged nozzle can be identified by holding
the tool 5-7" above the surface and checking for an even spray pattern. To clean a plugged
nozzle, remove the nozzle and direct pressurized air backwards through the nozzle or
backwash the nozzle with water. A convenient method is to insert the nozzle into a garden
hose ball valve, tighten the ball valve to a faucet, and turn on the water. (CFR has ball
valves available, part #7AX020). Inspect nozzle and repeat cleaning procedure, if
necessary. Discard nozzles that cannot be cleared. Tool nozzles wear and must be replaced
after 200-250 hours of use.
3. Occasionally open side panel(s) and inspect hose and other connections for leaks. Repair or
replace any leaking parts. Always disconnect power cord, before removing side panels.
4. It is very important to monitor machine operating hours for proper maintenance of the
motors and pumps. After 700 hours of operation, the vacuum motor brushes should be
inspected by an authorized repair station and replaced if worn (length is _ inches or less).
When replacing brushes, carefully insert brushes without crimping brush follower spring.
5. Check vacuum motor performance using a vacuum gauge (CFR #70412A). Place this gauge
on the tank inlet fitting with the vacuum turned on. Water lift should be between 120 and
135 inches. If the reading is lower, check for air leaks in the tank, cover gasket, and drain
hose.
6. Check pump performance occasionally against built-in pressure gauge.
Altra Pro 400/Altra 400 Heat - Pump running pressure should be 400 + 10 p.s.i. When
pumping fluid through one #04 nozzle, the pressure should be 340 + 20 p.s.i.
Altra Pro 1000 — Pump running pressure should be 1000 p.s.i. When pumping fluid through
one #04 nozzle, the pressure should be 940 + 20 p.s.i.
If the pumping pressure is outside of this range, check and clean the inlet filters to ensure
the pump is getting enough fluid. If the pumping pressure is outside of this range, call your
dealer or authorized repair station.
7. For extended storage or between uses in cold climates drain the system and flush pump with
automobile windshield washer fluid. If the pump is frozen it can be severely damaged.
8. Check main filter for plugging. Plugged filter will cause problems not only to daily
operations but to the e uipment itself. Once the filter is plugged, rinsing is not enough. Clean
the tank and fill with fresh water. Using filter cleaning nozzle assembly (CFR60567A) with
pressure of 400 p.s.i. wash off all debris inside out.
