Filter
Top Products
SECTION 105-R
VILTER MANUFACTURING CORPORATION
February 2001
PAGE 29
Replaces
440 VMC COMPRESSORS
March 1984
PISTON AND CONNECTING ROD REPLACEMENT PARTS
FOR 1200 RPM HIGH STAGE
Serial Numbers Below 3638
ITEM DESCRIPTION NO. REQUIRED PER COMPRESSOR SERIAL NO. PART
NO. OF CYL
2 4 6 8 12 16 FROM THRU NO.
501 thru Piston (Cup, CI) and Conn. Rod Assy Kit 2 4 6 8 - - - - 0* 1659 KT116
512 Piston (Cup, AL) and Conn. Rod Assy Kit 2 4 6 8 12 16 1660* 3637 KT117
501 Piston Ring, Compression 4 8 12 16 24 32 0 3637 31989M
502 Piston Ring, Oil 2 4 6 8 12 16 0 3637 31989N
503 Snap Ring, Piston Pin 4 8 12 16 24 32 0 3637 33244A
504 and Piston (Cup, CI) and Piston Pin Assy 2 4 6 8 - - - - 0* 1659 A32457A
505 Piston (Cup, AL) and Piston Pin Assy 2 4 6 8 12 16 1660* 3637 A32567A
506,507, Connecting Rod Assembly with 2 4 6 8 12 16 0 3637 KT212
510,511 & Bearing Kit
512
506 Bushing, Piston Pin 2 4 6 8 12 16 0 3637 31896B #
507 Connecting Rod and Cap 2 4 6 8 12 16 0 3637 Order Kit
509 Nut, Plain, Hex
3
/
8
”-24UNF 4 8 12 16 24 32 0 3637 2027A
510 Nut Lock,
3
/
8
”-24NF 4 8 12 16 24 32 0 3637 2028A
511 Bearing Half, Connecting Rod 4 8 12 16 24 32 0 3637 KT512 ++
511 Bearing Half, Connecting Rod -
.030” Undersize 4 8 12 16 24 32 0 3637 KT513 ++
512 Bolt, Connecting Rod 4 8 12 16 24 32 0 3637 31955A
519 Safety Yoke and Discharge Valve Inner
Thru Seat Assembly -
525 (for Volute Springs) 2 4 6 8 - - - - 0+ 2049 Obsolete
Except (for Helical Springs) 2 4 6 8 12 16 2050+ 3289 Obsolete
521 (for Damped Helical Springs, Amm&R22) 2 4 6 8 12 16 3290+ 3637 A33588A
(for Damped Helical Springs, R12 2 4 6 8 12 16 3290+ 3637 A33588B
519 thru Complete Safety Yoke Assy Kit (Amm) 2 4 6 8 12 16 0 3637 KT035
525 Complete Safety Yoke Assy Kit (R12) 2 4 6 8 12 16 0 3637 KT036
Except 521 Complete Safety Yoke Assy Kit (R22) 2 4 6 8 12 16 0 3637 KT037
Plus 408 &
409
519 Springs, Valve (Volute) 16 32 48 64 - - - - 0+ 2049 31915A
519 Springs, Valve (Helical) 16 32 48 64 96 128 2050+ 3289 33803A
519 Springs, Valve (Damped Helical) 16 32 48 64 96 128 3290+ 3637 13556A
Safety Yoke and Pin Assembly -
520 (for Volute Springs) 2 4 6 8 - - - - 0+ 2049 Obsolete
(for Helical Springs) 2 4 6 8 12 16 2050+ 3289 Obsolete
(for Damped Helical Springs) 2 4 6 8 12 16 3290+ 3637 A33585A
521 Spring, Safety Head 2 4 6 8 12 16 0 3637 31882A
523 Nut, 1” Flexloc 2 4 6 8 12 16 0 3637 1330B
524 Plate, Discharge Valve – Ammonia, R22 4 8 12 16 24 32 0 3637 33423A
524 Plate, Discharge Valve – R12 2 4 6 8 12 16 0 3637 33423A
525 Inner Seat, Discharge Valve 2 4 6 8 12 16 0 3637 33421A
NOTES:
Designation: C.I. = Cast Iron Pistons; Al. = Aluminum Pistons.
* All 1200 RPM VMC Compressors with Serial No. 1660 and above have aluminum pistons except 1875, 1876 and 1880, which
have cast iron pistons. All other 1200 RPM VMC’s have cast iron pistons with the exception of Serial No. 1489, which has the
aluminum pistons. See note on Page 10 for crankshaft requirements.
+ All 1200 RPM VMC Compressors equipped with old style 1200 RPM parts
from Serial No. 2050 thru 3289 had helical valve
springs. Below 2050 had volute springs except 829, 831, 1489, 1706, 1707, 1723, 1733 and 1735, which also had helical springs.
Above 3289 and thru 3637 had damped helical springs. Individual springs of each type are available for replacement; however,
safety yoke and pin assemblies and safety yoke and discharge valve inner seat assemblies to accommodate only the damped
helical springs are available, obsoleting all previous comparable assemblies. Therefore, when ordering these assemblies for
replacement on models previous to 3290, eight damped helical valve springs must also be ordered with each assembly. Damped
springs must then be specified for any subsequent spring replacement. It is not essential that this change be made on all
cylinders if made on one. As a means of identification, the regular helical springs are
7
/
16
" long and constructed with two dead
coils at the end of the spring that is inserted into the hole. The damped springs are
17
/
32
” long and are constructed with a special
coil at one end with a closer winding pitch (not completely closed). If desired, see page 24 for converting to new style 1200 RPM
parts.
#, ++ See note with same symbol on page 21.