F
OR
M
ODELS
: JGI, JGM, JGN, JGP
AND
JGQ
S
ECTION
5 - M
AINTENANCE
PAGE 5-44
VVCP - Removal
CAUTION!: BE SURE THAT ALL PRESSURE IS RELIEVED FROM THE COMPRESSOR
CYLINDERS PRIOR TO REMOVING VVCP.
Disconnect VVCP packing vent. Remove the VVCP from the cylinder using similar proce-
dures as when removing a cylinder head. The approximate weights of VVCP’s for handling
purposes can be found in the current Ariel Performance Program.
VVCP - Disassembly
For larger VVCP’s, unsnap thread protector bellows from the slot in adjusting handle. With
the locking handle locked, remove nylon-insert locknut and adjusting handle. Smaller
VVCP’s are not equipped with an adjusting handle, but have wrench flats on the stem for
adjustment. Some smaller VVCP’s have a dust cover. The smallest VVCP’s have a locking
nut in lieu of a locking handle. A hammer or puller may be required to break adjusting handle
to stem tapered fit. Loosen the locking handle (or locknut) and unscrew to remove. Remove
head bolting to remove VVCP from cylinder. Remove socket head screws at inside of bolt
flange and separate the halves of the VVCP. Unscrew the VVCP stem and piston assembly
to remove.
F
IGURE
5-32 C
OMPRESSOR
C
YLINDER
W
ITH
VVCP - T
YPICAL
Compressor
Cylinder
Backup Ring
V-Packing
VVCP
Assembly
Trapped Gas
Pressure
Locking Handle
or Locknut
Vent to Safe
Atmosphere
O-Ring
VVCP Piston Ring
(not gas tight seal)
Thread Protector Bel-
lows or Dust Cover
Over End of Stem
Adjusting Handle or on
smaller VVCP’s, Wrench
Flats on Stem for Adjusting
VVCP Stem and
Piston Assembly
Grease
Fitting
VVCP Packing
Compression
Spring
VVCP Piston
Snap Ring
Nylon Insert Locknut
to Secure Adjusting
Handle
See the Ariel Parts Book for the VVCP Assem-
bly Drawing and Parts List that applies.