Zenith C-30HDG manual 30HDG Pump Maintenance Pump, Sponge Clean-out Procedure, Piston Cup Wear

C-30HDG PUMP — MAINTENANCE (PUMP)

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

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.Startthepumpengineandpumpthehopperallthewaydown.

3.Disconnectthehosefromthepump.Fillthehopperwithwater and pump the remaining concrete out of the pump.

4.Openthehingeddischargeconeandthoroughlywashoutall remaining concrete (sand-sediment) from the cone and pumpmanifolds.Closethedischargeconeandlockinplace.

5.Takeasponge(2”x4”x6”)andsoakitwithwater.Takethehose that is disconnected from the pump and shake out the concretesothatabout2feetofitisclear.Insertthespongeinto 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.

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.

CAUTION - Checking Lubrication Oil Levels

The oil level must be checked daily to ensure adequate oil level and oil cleaniness.

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.

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

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

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