Product Manual A

Maintenance
68 MTP4000-6000DZV/DZD Operating Manual 31609 A
11. Fill the bearing housing with 10W-30 oil to where the static oil level is below the center of the sight glass. Do
not overfill.
ROLLER BEARING REMOVAL AND REPLACEMENT
Follow procedures in “Crankshaft Removal and Replacement” on page 66 and “Crankshaft Lip Seal Removal and
Replacement” on page 67.
CONNECTING ROD/DRIVE ROD ASSEMBLY
It is recommended that these items be purchased pre-assembled with bearing finish machined and reamed. For
removal, refer to “Crankshaft Removal and Replacement” on page 66 and “Crankshaft Lip Seal Removal and
Replacement” on page 67.
PEDESTAL BEARING AND SEALS REMOVAL AND REPLACEMENT
1. Remove the vacuum pump pedestal assembly, complete with lip seals, following the steps in “Crankshaft
Removal and Replacement” on page 66.
2. Remove the seals from the housing.
3. Use a bearing drift to push out the pedestal bearing.
4. Lubricate the new bearing an press it into the housing until the bottom edges of the bearing and housing are
flush with one another.
5. Lubricate the seal housing and press in the lower seal (lip nearest to bearing). (Assembly tool [P/N: 52655]
is available to assist with re-assembly of the lip seals in pedestal. Contact Generac Technical Service.)
6. Press the wiper seal into the pedestal with wiper lip uppermost.
Replace the pedestal assembly and remaining components, complete with lip seal, following the steps in “Crankshaft
Removal and Replacement” on page 66. Check the bearing housing oil level daily and add 10W-30 oil as necessary.
Fill to the center of the sight glass. Do not overfill.
Every six months or every 1500 hours, drain the bearing housing and refill with fresh 10W-30 oil. If pumpage is seen
exhausting from the vacuum pump discharge, shut the pump down and inspect the priming chamber.
STORAGE
The unit is adequately prepared for outside storage prior to shipment. Use the following list of additional suggestions
for extended storage.
Extended Storage Preparation
1. Disconnect the battery cables.
2. Store the unit off the ground so no water will accumulate around the equipment.
3. Protect the unit from blowing sand and dirt.
4. Stack no other items on top of the pump/equipment.
5. Protect the unit from the entry of any animals.
6. Periodically rotate shaft to lubricate bearings and protect bearings from brinelling.
7. Protect unit with approved drying agents (Silica Gel).