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February 2001
VILTER MANUFACTURING CORPORATION
SECTION 100-R
Replaces
PAGE 17
May 1985
450XL
®
* VMC COMPRESSORS
PISTON AND CONNECTING ROD ASSEMBLY
AND SAFETY HEAD REPLACEMENT PARTS
QUANTITY REQUIRED PER COMPRESSOR
ITEM DESCRIPTION NUMBER OF CYLINDERS PART
2 4 6 8 12 16 NUMBER
501 thru Piston Rings and Connecting Rod Assy Kit 2 4 6 8 12 16 KT573 **
508
501 Piston Ring, Compression 6 12 18 24 36 48 31989M
502 Piston Ring, Oil 2 4 6 8 12 16 31989N
503 Piston and Connecting Rod Assy 2 4 6 8 12 16 **
504, 507 Bearing Half and Lock Nut Kit 2 4 6 8 12 16 KT575
& 508
504 Lock Nut,
3
/
8
”, Connecting Rod 4 8 12 16 24 32 2028A
505 Nut, Plain Hex
3
/
8
”-UNF 4 8 12 16 24 32 2027A
506 Bolt, Connecting Rod 4 8 12 16 24 32 31955A
507 Bearing Half, Connecting Rod (upper) 2 4 6 8 12 16 Order KT575
508 Bearing Half, Connecting Rod (lower) 2 4 6 8 12 16 Order KT575
509 Spring, Safety Head 2 4 6 8 12 16 35252A
510
520
Safety Head Yoke Kit (includes 4 of item 513)
Booster-
Safety Head Yoke
2-Stage Low side-
Safety Head Yoke
2
2
-
4
4
-
6
6
4
8
8
-
12
12
8
16
16
-
KT543
31941B
31941B
511 Spring, Valve 16 32 48 64 96 128 33803A
512 Plate, Discharge Valve 2 4 6 8 12 16 35080SS
515B
Valve, Diaphragm Discharge (Booster)
2-Stage Low Side
6
-
12
-
18
12
24
-
36
24
48
-
31939B
Safety Hd. & Pins Assy (Std. Ammonia)
Safety Hd. & Pins Assy (2- Stage High Side Comp.)
2
-
4
-
6
2
8
-
12
4
16
-
A35082A
513 &
514
Safety Hd. & Pins Assy (#) (Halo)
Safety Hd. & Pins Assy (2- Stage High Side Comp.)
2
-
4
-
6
2
8
-
12
4
16
-
A35272A
513 Pin, Roll, 0.187” dia. x
11
/
16
” lg. † 8 16 24 32 48 64 1712F
514 Safety Head-STD.XL 2 4 6 8 12 16 ***
515 Spring, Valve 8 16 24 32 48 64 33803A
513 thru
518
Booster- Safety Head- Ammonia
Booster- Safety Head- Halo
2- Stage Low Side-Safety Head- Ammonia
2- Stage Low Side- Safety Head- Halo
2
2
-
-
4
4
-
-
6
6
4
4
8
8
-
-
12
12
8
8
16
16
-
-
A32695C
A32695D
A32695C
A32695D
519
Spring, Valve (Booster)
2- Stage Low Side
8
-
16
-
24
16
32
-
48
32
64
-
33803A
NOTES:
* Patents Pending.
** Piston, wrist pin and connecting rod sold only as a kit.
*** Shown for disassembly purposes only, order assembly.
† Install with pin’s outside longitudinal seam facing outside diameter of safety head.
# This Safety Head and Pins Assembly is used on standard Halocarbon and High Suction Pressure Ammonia Compressors. High
Suction Pressure Compressors are identified with an ‘X’ in the serial number. Also used in 2- Stage High Side Halo Compressors.