maintenance

Cleaning the pump is a very important operation as it determines how the machine will pump the next time it is used.

NOTICE

NEVER use muriatic acid to clean the pump. Acid will dissolve the chrome finish on material cylinder bore and main hydraulic cylinder rods.

At the end of every pour, or because of long delays during a pour, the pump and delivery system must be thoroughly cleaned by removing all concrete material.

1.Following the clearing concrete blockage operating procedure, ensure that there is no blockage in the hose and line or in the shuttle tube. If a blockage exists, clear it.

2.Pump concrete until the opening of the concrete cylinder intake in the hopper is visible.

3.Stop the pump.

4.Carefully disconnect the first hose joint at the shuttle tube discharge elbow.

5.Add water to the hopper. Pump and flush clean the entire hopper, shuttle tube and discharge elbow with water.

6.Scoop out 12 inches of concrete from the inboard end of the delivery hose. “Cork screw” a 6" x 6" x 8" sponge into the end of the first hose section. Reconnect the hose to the discharge elbow.

7.Fill hopper with water. Pump until sponge and clean water come out the discharge end of the hose and line system.

8.When the pump has been used to pump aggregate concrete or mixes with high fines content (60% or more sand) there will be a tendency for hardened concrete to build up on the inside surface of the shuttle tube. Therefore, at the end of every such pour, after the pump and system have been cleaned and the engine shut off, remove all remaining concrete.

9.Use only a 2½" diameter clean-out hook when back- pumping into redi-mix truck. Use a safety chain to secure the clean-out hook to some solid part of the mixer truck to prevent hook from jumping off of the drum. Run the pump at 6 strokes per minute maximum speed.

Hydraulic Oil System Maintenance

This Mayco pump is equipped with an in-tank return hydraulic filter with a 10 micron cleanable filter.The element has been designed to remove all particles large enough to cause wear and job break down. Under normal conditions, we recommend replacement every 6 months.

The most important factor to keep in mind is the effect of cold weather on the hydraulic oil. The viscosity (thickness) of the hydraulic oil will be much heavier.

ALWAYS run machine until oil temperature reaches a minimum of 50°F. before pumping. Damage to the main piston pump will occur if the machine is cycled too fast before the oil temperature reaches the minimum of 50°F. Cycle the machine at 6-8 strokes per minute at approximately 1/3 throttle.

In areas where the weather normally remains under 50°F., use Shell Oil Tellus 46 (or the equivalent).The above steps must be followed or severe damage to the main axial piston pump can occur.

1.When changing the hydraulic oil or topping off the reservoir (capacity 50 gal/189 liters), use only the following type hydraulic oil:

„„Shell Oil Tellius 68

„„Mobil DFE 26

„„Texaco Rand HDC

NOTICE

DO NOT mix oil brands! This may impair quality.

2.The following components should be greased daily, hourly if necessary:

„„Main Hydraulic Cylinders (2 grease fittings)

„„Swing Axle Bushing (1 grease fitting)

„„Shuttle Cylinder (2 grease fittings top and bottom) „„Discharge Nipple (3 grease fittings)

„„Outtriggers Option (2 grease fittings)

page 46 — MAYCO LS600P CONCRETE PUMP • operation manual — rev. #0 (05/13/13)

Page 46
Image 46
Multiquip LS600P operation manual Hydraulic Oil System Maintenance, „„Outtriggers Option 2 grease fittings

LS600P specifications

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