Gardner Denver C2500Q QUINTUPLEX, Operating And Service Manual

Page: 31 / 46

Page 25
Gear Reduction Unit
NOTICE
This assembly is a timed gear set,
and should be changed as a gear set.
If one gear is changed, both should
be changed. If one gear only is
changed, the gears must be timed.
1.
Disconnect the input pinion shaft from
the transmission or drive shaft.
2.
Disconnect the gear cover lube hoses
and remove the roto-seals from the
crankshaft.
3.
Remove the input drive flange from the
pinion shaft.
4.
Remove the input pinion seal and
pinion-seal housing from the gear
cover.
5. Remove the screws retaining the gear
covers and remove the covers.
6. Remove the bull gear alignment plate
bolts and plate.
7. Cut the safety wire (if used) and remove
the bull gear mounting fasteners.
8. Remove the set screws on the square
keys, pull with puller.
9. Connect a sling and overhead to one
gear. Pull gear off and lay on side for
safekeeping. Remove second gear.
10. Remove capscrews retaining pinion
bearing housings. Using jack-screw
holes, remove one housing.
11. Pinion and other housing may now be
removed with the aid of a lift.
Crankshaft Assembly
1.
Remove the pump from the trailer and
move it to service area. (The pump
service area must have overhead-lift
capability.) Power end must be level.
2.
Remove the fluid end as described in
"Fluid End Removal and Installation,"
page 20.
3.
Remove the oil stop head seal retainer
and gear covers as described in “Oil
Stop Head Seal Retainer and Gear
Covers,” page 23.
4.
Remove the crosshead assemblies as
described in “Crosshead Assembly,”
page 23.
5.
Remove the connecting rods as
described in “Crosshead Assembly.”
6.
Remove the bull gears as described in
“Gear Reduction Unit,” on this page.
7.
For best results, a “special” crankshaft
handling tool should be fabricated to fit
one of the Crankshaft bosses. This “L”
shaped lifting tool should come up and
over the top of the pump, out to the
centerline for easy, balanced lifting of
the crankshaft. This tool must be
capable of lifting the crankshaft in a
horizontal position.
8.
Install the “special” crankshaft lifting
tool and balance the crank with an
overhead lift.
9.
Take the weight off the crankshaft, and
move it out of the frame and thread the
crankshaft through the bearing races
until all of the bearings are free.
10. Carefully place the crankshaft on a
clean piece of cardboard, clean
plywood, or clean rug. Cover the
crankshaft and bearings with plastic to
prevent contamination of the bearings.
13. Remove bearing retainers from the
frame, if the bearings are to be
replaced.
14. If the crankshaft main-bearings are to
be replaced, all bearing retainers must
be removed from the crankshaft. The
crankshaft should be held in a vertical
position, and the bearings rapidly
heated and allowed to drop off to the
floor.