Product Manual A

Maintenance
58 MTP4000-6000DZV/DZD Operating Manual 31609 A
LUBRICATION INSTRUCTIONS
Bearings in all frames are greased at the factory before shipment.
Lubrication requirement vary with speed, power, load, ambient temperatures, exposure to contamination and
moisture, seasonal or continuous operation and other factors. The brief recommendations which follow are general
in nature and must be coupled with good judgment and consideration of the application conditions. For re-greasing
periods, refer to the table below. When adding grease, be sure the grease and fittings are absolutely clean.
Grease used for these bearings should be equivalent to one of the following manufacturer’s products:
• G.E. Long Life Grease No. D682C5
• Mobil Mobilux No. EP2
• Shell Alvania EP2
• Texaco Multifak AFB 2
To lubricate frame bearings, remove the plastic cover and zerk fittings. Make sure the fitting and end of the grease
gun are clean. Use a hand-operated grease gun and pump a small amount into each bearing cavity. The surplus
grease will go through the bearing and into the center part of the frame.
For re-greasing periods and approximate quantity, refer to the table below.
First determine frame size (located on serial number plate).
Example: 5HH-
65B4, 4NNT-VF16, 10YB-F18DB, 6NHTA-VC18, 4RB-EM16
MECHANICAL SEAL
The location of the mechanical seal in your pump is shown in Figure 23. The stationary seat is held in the backplate.
All other parts of the seal rotate with the shaft and impeller. The seal chamber must be full of liquid before operating
the pump.
No maintenance is required for the mechanical seal. However, the pump should be examined at regular internals
for leakage resulting from wear of the sealing faces. Occasionally, new installations will leak for a short time. These
must be inspected daily. If the leakage does not reduce to almost zero, the assembly should be examined for proper
seal installation. Replace damaged seals or mechanical seal oil as necessary.
Removing the Mechanical Seal
If the seal is to be removed, remove the impeller according to the instructions for dismantling the pump. The rotating
portion of the seal may now be seen. Slide off the seal spring. Lubricate the shaft and remove the reminder of the
rotating portion, being careful to avoid damaging the primary seal. The rubber bellows will be firmly attached to the
shaft and considerable pressure will be required to remove it. Refer to Figure 23 on page 59.
Table 4 - Recommended Re-Greasing Periods for Frames
Frame Size
2-5-11 and
EM309
6-7-8-16 60B4
through 68B4
10-12-13-13D
18-18D
20-24 30
Total Running Time 2,000 hours 1,500 hours 1,000 hours 1,350 hours 2,000 hours
8 Hour Day Service 36 weeks 27 weeks 18 weeks 24 weeks 36 weeks
24 Hour Day Service 12 weeks 9 weeks 6 weeks 8 weeks 12 weeks
Approximate Amount of
Grease per Line Fitting
.5 cubic inch 1.25 cubic inch 2 cubic inch 3 cubic inch 4 cubic inch
Approximate No. of
Pumps with Grease Gun
(hand operated)
3 pumps 6 pumps 12 pumps 18 pumps 23 pumps