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SECTION 105-R
VILTER MANUFACTURING CORPORATION
February 2001
PAGE 21
Replaces
440 VMC COMPRESSORS
February 1985
PISTON AND CONNECTING ROD ASSEMBLY AND SAFETY HEAD REPLACEMENT PARTS
1200 RPM High Stage and Two-Stage Compressors
Serial Number 3638 to Present
NO. REQ. PER COMPRESSOR SERIAL NO.
ITEM DESCRIPTION
SINGLE STAGE
TWO-
STAGE
PART
NO. OF CYL.
2 4 6 8 12 16 6 12 FROM THRU NUMBER
501 thru
505 Piston (Flat, AL) Rings and Pin Kit 2 4 6 8 12 16 6 12 3638 Present KT213
501 thru
512
Piston (Flat, AL) & Connecting Rod
Assembly Kit
2 4 6 8 12 16 6 12 3638 Present KT478
501 Piston Ring, Compression 6 12 18 24 36 48 18 36 3638 Present 31989M
502 Piston Ring, Oil 2 4 6 8 12 16 6 12 3638 Present 31989N **
503 Snap Ring, Piston Pin 4 8 12 16 24 32 12 24 3638 Present 33244A
504 & Piston and Pin Assembly 2 4 6 8 12 16 6 12 3638 Present Order Kit
505
506 thru Connecting Rod Assembly with 2 4 6 8 12 16 6 12 3638 Present KT463
512 Bearings Kit
510 & Bearing Half & Lock Nut Kit (std size) 2 4 6 8 12 16 6 12 3638 Present KT512
511 Bearing Half & Lock Nut Kit (undersize) 2 4 6 8 12 16 6 12 3638 Present KT513
506 Bushing, Piston Pin 2 4 6 8 12 16 6 12 3638 Present 31896B #
507 Connecting Rod and Cap 2 4 6 8 12 16 6 12 3638 Present Order Kit
509 Nut, Plain, Hex
3
/
8
”-24UNF 4 8 12 16 24 32 12 24 3638 Present 2027A
510 Nut, Lock,
3
/
8
”-24NF 4 8 12 16 24 32 12 24 3638 Present 2028A
510 &
511
Bearing Half, Conn Rod (w/o Groove)
Standard Size ++ 4 8 12 16 24 32 12 24 3638 Present KT512
0.015” Undersize 4 8 12 16 24 32 12 24 3638 Present KT513A
0.030” Undersize 4 8 12 16 24 32 12 24 3638 Present KT513
512 Bolt, Connecting Rod 4 8 12 16 24 32 12 24 3638 Present 31955A
513 Safety Head Assembly, Ammonia
Thru (for Helical Springs) 2 4 6 8 12 16 6 12 3638 Present A32695C
518 Safety Head Assembly, R12 and R22
(for Helical Springs) 2 4 6 8 12 16 6 12 3638 Present A32695D
513 Nut, Lock,
3
/
8
” Valve Retaining 2 4 6 8 12 16 6 12 3638 Present 1776B
514 Washer, Diaphragm Valve 2 4 6 8 12 16 6 12 3638 Present 31990B
515 Valve, Diaphragm Discharge 6 12 18 24 36 48 18 36 3638 Present 31939B
516 Spacer, Diaphragm Valve 2 4 6 8 12 16 6 12 3638 Present 31990A
517 † Safety Head, Ammonia
(for Helical Springs) 2 4 6 8 12 16 6 12 3638 Present 33531B
517 † Safety Head, R12 and R22
(for Helical Springs) 2 4 6 8 12 16 6 12 3638 Present 33532B
518 Screw, Valve Retaining (60°) 2 4 6 8 12 16 6 12 3638 13,490 31964A
518 † Screw, Valve Retaining (82°) 2 4 6 8 12 16 6 12 13491 Present 1527B
519 Springs, Valve (Helical) 8 16 24 32 48 64 24 48 3638 Present 33803A
520 Yoke, Safety Head 2 4 6 8 12 16 6 12 3638 Present 31941B
521 Spring, Safety Head 2 4 6 8 12 16 6 12 3638 Present 31882A
NOTES:
* For replacement parts for compressors having serial numbers below 3638, see page 29.
** These oil rings do not require expanders. Do not use expanders. They may cause excessive wear.
# Replacement bushing must be reamed after installation to properly accommodate piston pin.
++ Replaces bearing half with groove. If compressor has standard size bearings with groove, order 31957B-Std. Size bearing half.
If crankshaft is groove undersize, order KT513 or KT513A bearing half set with locknuts with no groove.
† When ordering safety head (Item 517) for machines with serial number below 13491 – Item 518 (1527B) must also be ordered.
Screw hole was changed from a 60° hole to an 82° hole.
AL = Aluminum Pistons