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C-30hdg pump — maintenance (pump) – Multiquip C30HDG User Manual

Page 39

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MAYCO C-30HDG PUMP — OPERATION AND PARTS MANUAL — REV. #6 (04/02/12) — PAGE 39

C-30HDG PUMP — MAINTENANCE (PUMP)

Lubrication Box

The C-30HDG model features a fully enclosed

lubrication box,

which utilizes the

"SPLASH"

method of lubrication.

Visually inspect the oil in the lubrication box (Figure 16) by making
sure the oil is at the correct operating level as indicated by the
dip stick. Also reference the oil level decal (Figure 17) adjacent
to the lubrication box.

Make sure the pump is on a secure level surface
when checking the oil level inside the lubrication
box.

Piston Cup Wear

The

rubber piston cups

are a natural wear component and

will require

periodic replacement. The life of the rubber cups

depends on many factors, proper oil level, oil cleanliness,
abrasiveness of aggregrate being pumped and material slump
etc.

IMPORTANT! To ensure maximum cup life, the oil
level in the lubrication box

must be

maintained at

the proper level. In addition the lubrication box must
be cleaned periodically.

As the rubber piston cups wear, fine cement particles will
accumulate in the bottom of the lubrication box. Once this cement
paste reaches 1-inch in height, it is recommended that the
lubrication box be drained (flushed) and cleaned and the oil
replaced with new SAE 30 motor oil.

There are two clean-out ports located at the
bottom of the lubrication box.

Any questions regarding the lubrication box clean-out procedure,
contact the MAYCO Service Department.

The pump engine should be turned OFF, as
explained in General Clean Up Procedure.

After the sides of the hopper have been cleaned,
add a small amount of water to the remaining
concrete in the hopper and hand mix.

2. Start the pump engine and pump the hopper all the way down.

3. Disconnect the hose from the pump. Fill the hopper with water

and pump the remaining concrete out of the pump.

4. Open the hinged discharge cone and thoroughly wash out all

remaining concrete (sand-sediment) from the cone and
pump manifolds. Close the discharge cone and lock in place.

5. Take a sponge (2”x 4”x 6”) and soak it with water. Take the hose

that is disconnected from the pump and shake out the
concrete so that about 2 feet of it is clear. Insert the sponge into
the hose.

6. Reconnect the hose to the pump. Fill the hopper with water

and resume pumping. Run the pump approximately half
throttle. The sponge will be discharged at the end of the line
followed by clear water. At this point, the pump and lines will
be completely clean and ready for the next job.

Repeat steps 1 through 6 a few times to ensure
that the hose lines are thoroughly cleaned.

Sponge Clean-out Procedure

This section will explain the recommended procedure for using
a

sponge

to clean out the

hose lines.

CAUTION - Clearing The Pump

NEVER use

muriatic acid

to clear the pump. Acid will dissolve

the chrome finish on the pumping cylinder.

NEVER use compressed air to clean out the lines.

When using a clean-out hook to clean out the rear of the redi-
mix truck, use a

safety chain

to secure the clean-out hook to

some solid part of the redi-mix truck to prevent the hook from
jumping off the redi-mix truck’s hopper. Run the pump at half
throttle.

1. After completion of the pour, pump the remaining concrete in

the hopper through the discharge line. Using a shovel, clean
the sides of the hopper.

CAUTION - Checking Lubrication Oil Levels

The oil level must be

checked daily

to ensure adequate oil

level and oil cleaniness.