MSI QI-1000, Technical Manual, Page: 18 / 56

3.50 Every 250 hours Preventative Maintenance
a) Check all items on “daily,” “weekly,” and “100 hours” list.
b) Change the Power Frame lube oil and refill with the proper grade of gear oil for upcoming
ambient conditions.
c) Thoroughly clean the Power Frame lube suction strainer.
d) Remove and inspect the plungers and packing assembly components.
e) Replace all packing pressure rings and header rings.
f) Clean the plunger pump’s oil breather and the Power Frame lube oil reservoir breather.
3.60 Yearly or as Required Preventative Maintenance
a) Replace worn plungers and packing brass.
b) Replace worn or corroded valve covers, suction valve stops, packing nuts, discharge flanges,
pump tools, etc.
c) Replace all discharge flange seals and suction manifold seals.
d) Replace any defective gauges and instruments.
3.70 Inspection of Bearings and Gears
a) Inspection of the gears, bearings, and journal bearings should be made every 500 hours. Look
in the oil filter for telltale clues such as flaking metal. Also check for end play on pinion shaft.
This is easily checked by placing a dial indicator on face of Spicer flange and pulling on the
Spicer flange. There should be no movement on the Spicer flange. If end play is noted see
Section
7.10 paragraph (k) .
b) Remember: Pitting, spalling, and other surface defects are an indication of impending failure.
Replace as necessary.