Multiquip LS600P Changing the Concrete Cylinder Piston Cups, Cylinder Cup Replacement Procedure

maintenance

RUBBER CUTTING

ENERGIZER RING

WEAR

PLATE

SHUTTLE TUBE

(INSIDE HOPPER)

GOOD SEAL LEAKING

Figure 56. Wear Plate and Cutting Ring

Changing the Concrete Cylinder Piston Cups

The urethane piston cups will occasionally require replacement depending on the following factors.

„„The fluid level and cleanliness of the lubrication box.

„„The size and type of aggregate.

„„The type of concrete being pumped.

It is time to replace the cups when increasingly large particles of sand and cement pass into the lubrication box. DO NOT allow the cups to become so worn that they begin to pass lubrication into the material cylinders.

If the liquid level of the lubrication box becomes to low, the rubber cups will severely deform due to excessive heat. Whenever replacement is due, both cylinder cups should be replaced.

DANGER

AMPUTATION HAZARD

D u r i n g r o u t i n e m a i n t e n a n c e o r removing material blockage, you will be required to put your hand in the concrete cylinders or near the

shuttle tube. You are at extreme risk of injury or AMPUATION if the engine is running or if pressure is in the hydraulic system.

Prior to performing any maintenance on the pump, follow described lock out-tag out procedures. Stop the engine by turning off the ignition switch and remove the starter key.

Place a DO NOT OPERATE tag over the switch and disconnect the battery. The pressure reading on the accumulator pressure gauge MUST read zero. ALWAYS make sure the accumulator circuit pressure reads zero prior to performing any maintenance on the pump.

Cylinder Cup Replacement Procedure

1.Remove the two hydraulic hoses connected to the remix motor. Plug the ports with fittings (not provided) to prevent hydraulic hose leakage.

2.Remove the hopper discharge nipple and loosen sleeve seal. Inspect and replace if wear is excessive.

3.Remove the two tie rod nuts and the four eyebolt nuts securing the hopper to the pump frame.

4.Using an approved lifting device, remove the hopper using extreme care not to damage the hopper seal.

5.Start the engine and turn on the pressure test switch. Cycle pump in reverse until hydraulic system obtains maximum pressure, then turn pump and engine

off.

6.Remove ignition key and disconnect battery. Think safety! Check the hydraulic gauges on panel and make sure accumulator pressure reads zero. One piston should be in the fully discharged position at the end of the concrete cylinder.

MAYCO LS600P CONCRETE PUMP • operation manual — rev. #0 (05/13/13) — page 49