Mega MMP4, Maintenance Manual

Page: 21 / 96

MMP4-CAT(T4)-MX-2
26 Feb 2014
SECTION 5
Water Pump Assembly
5-2
3. Ensure the use of only clean, compatible
hydraulic oil. The hydraulic system must have a
filter rated at 10 micron filtration.
4. When disconnecting and reconnecting the
hydraulic hoses to the pump, ensure the fittings
are kept clean.
5. Check hydraulic fluid levels. Fluid levels must be
maintained at 80% to 90% of the level shown in
the sight glass.
6. Check hydraulic fluid for excessive bubbles,
foaming and water contamination.
7. Use hydraulic oils with anti-wear additives such
as these recommended oils or their equivalent:
•
Pennzoil AW46 Hydraulic Oil
• Texaco Rando HDAZ
• Shell Tellas Hydraulic Oils
• Mobil D.T.E. 20 Series
• Chevron EP Hydraulic Oils
• Exxon Univis N Hydraulic Oils
When using this equipment in environmentally
sensitive areas the use of bio-degradable or non-
hazardous oils such as: Chevron Clarity, Exxon
Univis Bio 40 or Mobil EAL 224H are
recommended.
8. Remove Item 40 on Figure 1 to gain access to the
bearing housing reservoir fill plug (Item 34 in
Figure 1) and item 23 on the discharge bowl, with
the water pump in a vertical position.
The water pump must be removed from the
boom and set in a vertical position on the inlet
end when performing this action. Any other
position will result in incorrect servicing and
improper component oil level will decrease the
service life of the water pump, shaft and bearings.
There are 2 bearing fluid reservoirs in the MMP4
water pump housing.
9. Check oil in the 2 bearing housings.
10. Slight dark discoloration of the oil in the bearing
housing is normal. This is due to the wearing of
the carbon face seal.
11. Presence of water or emulsified oil in the bearing
housing indicates immediate need for seal
replacement and inspection of bearing. If this
condition is present, refer to MMP4 Disassembly
Instructions.
12. (If required) Change oil in the bearing housing if
no contamination or fluid loss is present. Use
clean non-detergent 10W, 20W oil, AW32 or
AW46 hydraulic oil.
CLOSED
Oil Level Check Plugs
on Axial Water Pump