KEENAN MechFiber 250 and
280 Operator’s Manual
22
Revision C01, 04
th
Dec 2019
8 Maintenance
The KEENAN Mixer Wagon has been designed for optimum performance with a minimum of
maintenance. Chains, bearings and grease points have been kept to a minimum without
compromising function. All components are of high quality and provide excellent durability.
Regular routine maintenance will ensure your KEENAN Mixer Wagon gives you the best results
with a minimum of problems.
WARNING:
Prior to carrying out any maintenance on the machine, always ensure tractor
engine is stopped and disconnect the PTO and hydraulic hoses from the
tractor. Observe safety precautions at all times when working on machine,
read Section 5 on safety before attempting to work on machine.
The recommended operating pressure in the hydraulic circuit is 170 bar and a flow rate of 40
litres per min. Replacement hoses should comply with DIN EN 853. When replacing hydraulic
hoses, always wear suitable protective equipment.
8.1 Chains
1.
Each week check the condition of the chain tension arms and adjust as required. There
are two chains used on the KEENAN model. The primary drive chain (ASA100) drives
the idler shaft, and the auger shaft from the input shaft (see figure 9) and the secondary
chain (ASA140HS) drives the rotor. Both chains are tensioned by spring assemblies on
the slack side of the chain.
Note:
ASA100 chain uses split pins in the joiner link as shown
while the ASA140HS chain uses roll pins due to the high loads
involved.
Figure 8: Chain Joiner Link
2.
Each day, check the level of oil in the automatic oiler reservoir (where fitted). If the oil
level is low, top it up with light oil, grade SAE 10 or similar. The capacity of the reservoir
is
1.89 litres.
Note:
A: Do not use heavy/high viscosity oil, as the backpressure in the pipes may cause them
to be blown out.
B: Do not use grease on the chains, as it is unsuitable for the application and will not
allow lubrication of the vital internal parts of the chain.
