F
IGURE
5-28 “W
ATER
”-C
OOLED
P
ACKING
C
ASE
T
URNAROUND
C
UP
Coolant Turnaround Cup Circumferential
Identification Groove (All - beginning in 2006)
O-Ring
Groove
F
OR
M
ODELS
: JGI, JGM, JGN, JGP
AND
JGQ
S
ECTION
5 - M
AINTENANCE
PAGE 5-38
Water-Cooled Piston Rod
Packing
When any disassembly of a “water”-cooled rod
packing case is required from the as supplied - as
received condition from the manufacturer, proper
reassembly and testing is required. This is to test
the cases for leaks.
Reassembly
Refer to “Piston and Rod Reassembly” on page
5-29 and “Types of Piston Rod Packing Rings” on
page 5-35.
Be sure to refer to the pressure packing assembly in the Ariel Parts Book. Ariel provides a
Parts Book for each unit. Please contact your distributor if you do not have the Parts Book. A
pressure packing assembly drawing also is packaged with each pressure packing re-build
kit.
“Water”-cooled cases are lapped, and special care must be taken to prevent scratching the
mating surfaces of the cups, which can cause significant problems. Cup surfaces must be
clean and dry when being re-assembled.
The cups are numbered on the outside diameter and are to be assembled in consecutive
order, starting with the end cup. Refer to the pressure packing assembly the Ariel Parts Book
and Figure 5-28 on Page 5-38. The studs are offset so the cups will only fit one way.
Make sure the tie studs are completely screwed into the end cup. Put the proper ring in the
groove and facing the proper direction. Long tie studs hold the pressure packing together.
The stud holes are not equally spaced. This prevents the stack of parts from being aligned
incorrectly. Be careful when sliding parts onto the tie studs to be sure that no scratching
occurs to the lapped faces. Unless non-lube, rings are to be lightly coated with new clean
lubricant before reassembly. Only use the same lubricant that is used in the force feed lube
system.
Install second cup next, put the rings in place, and make sure the two (2) small O-rings are
in place around the coolant holes.
Continue assembling the remaining parts in the proper configuration to the packing case
drawing, in consecutive order, by repeating the above step.
Install tie stud-nuts and tighten to the values given in Table 1-12 on page 1-16. Make sure
that all rings move freely, radially, in their grooves using fingers.
Testing
100 percent verification of function is required for all internal passages.
The passages are to be checked by blowing clean, dry compressed air through the connec-
tion taps on the flange and verifying that air is exiting at the proper holes. When air is applied
to the connection tap stamped “Coolant In”, air should be exiting the connection tap stamped