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February 2001
VILTER MANUFACTURING CORPORATION
SECTION 102-R
Replaces
PAGE 15
March 1985
450 VMC COMPRESSORS
(High-Stage, Two-Stage, Booster and Heavy Duty)
CYLINDER LINER AND CAPACITY CONTROL REPLACEMENT PARTS
(For All Serial Numbers Unless Otherwise Noted)
QUANTITY REQUIRED PER COMPRESSOR
ITEM DESCRIPTION NUMBER OF CYLINDERS PART
2 4 6 8 12 16 NUMBER
401, 402 Cylinder Liner Assembly (High-Stage)
& 403 (for cylinder without unloading) 2(1*) 2 2 4 4 8 KT475
401, 402 Cylinder Liner Assembly (High-Stage)
Thru 408 (for cylinder with unloading) -(1*) 2 4 4 8 8 KT476
401A, 402, Cylinder Liner Assembly (Two-Stage)
403 & 408A (for cylinder without unloading) - - - - 2(3*) - - 4(6*) - - A35108D
401A, 402 Cylinder Liner Assembly (Two-Stage)
Thru 408A (for cylinder with unloading) - - - - 4(3*) - - 8(6*) - - A35108C
401 Liner, Cylinder (High-Stage) 2 4 6 8 12 16 34510A
401A Liner, Cylinder (Two-Stage) - - - - 6 - - 12 - - 34710A
402 Seal, ‘O’ Ring (upper High Stage & Two-Stage) 2 4 6 8 12 16 2176BH
403 Pin, Roll, 0.125” dia. X 1½” lg. 8 16 24 32 48 64 1193Q
405 Ring, Lift -(1*) 2 4(3*) 4 8(6*) 8 35071A
406 Spring, Lift -(8*) 16 32(24*) 32 64(48*) 64 35069A
407 Pin, Lift -(8*) 16 32(24*) 32 64(48*) 64 35070A
408 Retainer, Lift Ring -(1*) 2 4(3*) 4 8(6*) 8 1971A
408A + Seal, ‘O’ Ring (lower – Two-Stage only) - - - - 6 - - 12 - - 2176BL
409 Plate, Suction Valve 2 4 6 8 12 16 31909A
410A Piston Kit, Cap Red (Oil Actuated †)
411A & 412 Serial Number 45,000 thru 45,999++ -(1*) 1 2(3*) 2 4(6*) 4 KT364
410 Piston Kit, Cap Red (Gas Actuated†)
411 & 412 Serial Numbers 60,000 thru 61,199++ -(1*) 1 2(3*) 2 4(6*) 4 KT034
410 Piston Ring (Steel – For Gas Actuated) -(4*) 4 8(12*) 8 16(24*) 16 31989L
410A ‘O’ Ring (Rubber – for 0.187” Groove) -(1*) 1 2(3*) 2 4(6*) 4 2176AX
410B Ring Set (PTFE – for 0.120” Groove) -(1*) 1 2(3*) 2 4(6*) 4 2557A
411/411A Piston, Unloader (Gas or Oil) -(1*) 1 2(3*) 2 4(6*) 4 Order Kit
412 Pin, Long Pivot -(1*) 1 2(3*) 2 4(6*) 4 33250C
413 Complete Capacity Control Mechanism Assembly
Thru Serial No. 45,000-45,999 & 60,000-61,199++
420 (2 Cylinder and Two-Stage) -(1*) - - -(3*) - - -(6*) - - A33577A
(High-Stage) - - 1 2 2 4 4 A33354A
413 Arm, Yoke Lifting -(1*) 1 2(3*) 2 4(6*) 4 33338A
414 Yoke Assembly (2 Cylinder and Two-Stage) -(1*) - - -(3*) - - -(6*) - - A33575A
414 Yoke Assembly (High-Stage) - - 1 2 2 4 4 A33335A
415 Pin,
3
/
8
” x
11
/
16
” lg. Roll -(1*) 1 2(3*) 2 4(6*) 4 1193X
416 Pin, Short Pivot -(1*) 1 2(3*) 2 4(6*) 4 33250B
417 Spring, Unloader Yoke -(4*) 4 8(12*) 8 16(24*) 16 33686A
418 Yoke Guide Assy (2 Cylinder and Two-Stage) -(1*) - - -(3*) - - -(6*) - - A33576A
418 Yoke Guide Assy (High-Stage) - - 1 2 2 4 4 A33347A
419 Screw,
3
/
8
” x 1” Cap Lock -(2*) - - -(6*) - - -(12*) - - 1352D
420 Spacer, Sleeve -(2*) - - -(6*) - - -(12*) - - 33618A
NOTES:
* Except for 2 cylinder and Two-Stage machines, parts quantities are listed for standard unloading only. The 2 cylinder and Two-
Stage quantities are listed in parentheses ( ) for the 50% option. Standard unloading on compressors with 2 cylinders is none; 4
cylinders is 50%; 6 cylinders is 33 and 66%; 8 cylinders is 25 and 50%; 12 cylinders is 33 and 66%; 16 cylinders is 25 and 50%; and
Two-Stage is none. See Operation Section for unloading options. Also, for single cylinder unloading, the yoke assembly (Item 414)
and two pins on the yoke guide assembly (Item 418) have drilled and tapped holes to accommodate screws (Item 419) and spacers
(Item 420).
† Actuation type can be determined by checking the unloading solenoid valve – gas uses two-way valves, oil uses three-way valves.
For oil unloaded compressors: In serial number range 45,000 thru 45,858, the design version of “unloader piston with one Rubber
Ring in a 0.187 in. Groove” was used. In serial number range 45,859 thru 45,999, a “PTFE/Rubber Ring Set in a 0.120 in. Groove”
was used. Pistons are interchangeable, but the rings are not.
+ This lower ‘O’ Ring Seal is for Two-Stage
Compressors only. Some initial design High-Stage Compressors also had a similar seal.
Its use on the High-Stage machine was discontinued because it is not really needed. It is no longer available. Do not
order the
Two-Stage Seal for use on these older High-Stage machines. It will not fit.
++ For serial numbers above these ranges, see Page 17.