Eaton Electrical 350 - Manual (Page 31)

31 EATON 350 Series Dual Path Mobile Pumps E-PUPI-TS006-E September 2007
Step 3
Compress a piston backup ring
5987241-001 and insert it in the
servo piston bore, which is
perpendicular to the bearing bore;
let the backup ring expand into
the seal groove.
Step 4
Insert a Teflon glide ring
5987241-001 in the same way,
so that it fits in the seal groove
inside the backup ring.
Step 5
Using the same method,
install backup rings and Teflon
glide rings in the other side of
the servo piston bore.
Step 6
Lubricate the leading edge of
a servo piston assembly, and
insert it in the piston bore. The
threaded servo piston bolt
should extend about 20mm
(.80 in) beyond the housing.
Assembly
Servo Piston/
Dual Pump Housing
Assembly
Step 10
Thread a locking nut (item 8)
onto the servo piston bolt
until it fits against the spring
compression nut.
Step 11
Apply one drop of Loctite 290
to the threads of the servo
piston bolt where the spring
compression nut and locking
nut will meet.
Step 12
This step may require two people:
Using a 5mm hex key, hold the
servo piston bolt steady, then
use two 9/16-inch open-ended
wrenches to tighten the locking
nut against the spring compres-
sion nut. The servo piston bolt
should turn freely but should
not move in or out of the
servo piston.
Step 1
Place the center housing on a
stable work surface.
Step 2
Using snap-ring pliers, insert a
snap ring 16077-33 in each
of the two grooves inside the
bearing bore.
Dual Pump Housing
Assembly