Quincy QR-25 Series User manual

Quincy
Compressor®
True Blue ReliabilityTM
This manual contains important safety
information and should be made available
to all personnel who operate and/or
maintain this product. Carefully read this
manual before attempting to operate or
perform maintenance on this compressor.
Fill Out & Return
Warranty Registration Card Located Inside
Manual No. 50216-105 July 1999 Edition
Quincy
QR-25®Series
Model 340
Parts Manual · Record of Change 105

QR 340 Quincy Compressor
50216-105, July 1999 1 3501 Wismann Lane, Quincy IL. - 62305-3116
INTRODUCTION
This manual provides information for the following
QR-25 Series, Model 340 (Record of Change 105)
compressor versions:
P Control Version P
plain head assembly & no controls
PUL Control Version PUL
plain head assembly with a pressure
relief valve
L Control Version L
head assembly with 2 unloader towers &
a hydraulic unloader
S Control Version S
head assembly with 2 unloader towers &
a pilot valve
LS Control Version LS
head assembly with 2 unloader towers,
a hydraulic unloader, & a pilot valve
with a check valve assembly
LVD Control Version LVD
head assembly with 2 unloader towers,
a hydraulic unloader, & a pilot valve
with a lockout & check valve
These compressors are aircooled, two stage, two
cylinder, pressure lubricated compressors, with up
to 200 p.s.i. continuous pressure capability (201 to
500 p.s.i. intermittant pressure capability with proper
configuration; consult factory). The Model 340 has a
5-1/4" low pressure bore, a 3" high pressure bore, a
3-1/2" stroke and can be run at 400-900 r.p.m.
Available options included in this manual:
-hooded air filter
-hooded air filter / silencer
CHANGES
since previous printing dated January 1999:
Valve adjustment bolt and jamnut were com-
bined to create an assembly.
Added crankcase lubricant capacity.
TABLE OF CONTENTS
Serial Number Identification ................................. 2
Ordering Replacement Parts ................................ 2
Quin-Cip Oil ........................................................... 2
Crankcase Lubricant Capacit ............................. 2
Crankshaft Group .................................................. 3
Crankcase Group................................................... 4
Bearing Carrier Groups
with oil filter .....................................................5-6
less oil filter ..................................................... 7-8
Connecting Rod & Piston Groups
low pressure ..................................................9-10
high pressure .............................................. 11-12
C linder & Head Groups
Control Version P ........................................ 13-14
Control Versions L, S, LS, LVD .................. 15-16
Head Assemblies
Control Versions P ...................................... 17-18
Control Versions L, S, LS, LVD .................. 19-20
Control Groups
Version L ........................................................... 21
Version S ........................................................... 22
Version LS ........................................................ 23
Version LVD ...................................................... 24
Pilot Valves .......................................................... 25
Pilot Valve Repair Kit .......................................... 25
Differential Setting Charts .................................. 25
Suction Valve Unloader Assemblies .................. 26
H draulic Unloader Assemblies ......................... 27
Decals ................................................................... 28
Gasket Set ............................................................ 28
Recommended Spare Parts ................................ 28
Kits ....................................................................... 28
T pical Unit Repair Parts List ............................. 29

QR 340 Quincy Compressor
50216-105, July 1999 2 3501 Wismann Lane, Quincy IL. - 62305-3116
MODEL &
SERIAL NUMBER
IDENTIFICATION Record
of
Change No.
Model & Serial Number
Identification Tag
The model & serial number tag is located on the
handhole plate side of the crankcase. Fill in the
numbers from your compressor's tag in the corre-
sponding spaces provided here and reference this
page when ordering replacement parts.
All replacement parts are to be ordered through
an authorized Quincy Compressor Distributor. In-
sist on genuine Quincy parts only! Failure to do so
may void warranty.
ORDERING
REPLACEMENT PARTS
Prompt service can be rendered on repair parts
orders if the following information is given:
Item 1) the model number, record of change
number, & serial number.
Item 2) the exact part number needed. (Do not
order by item numbers.)
Item 3) the exact quantity needed.
Item 4) the preferred type of transportation
DANGER !
QUIN-CIP® OIL
Refer to the chart below to order Quin-Cip compres-
sor oil from your local Authorized Quincy Distribu-
tor.
Package Part No. Description
Barrel 112541D032 55 gal., SAE 10W
Pail 112541P032 5 gal., SAE 10W
Gallon 112541G032 1 gal., SAE 10W
Gallon Case 112541X032 (4)-1 gal., SAE 10W
Quart 112541Q032 1 qt., SAE 10W
Quart Case 112541C032 (12)-1 qt., SAE 10W
Barrel 112542D068 55 gal., SAE 20
Pail 112542P068 5 gal., SAE 20
Gallon 112542G068 1 gal., SAE 20
Gallon Case 112542X068 (4)-1 gal., SAE 20
Quart 112542Q068 1 qt., SAE 20
Quart Case 112542C068 (12)-1 qt., SAE 20
Barrel 112543D100 55 gal., SAE 30
Pail 112543P100 5 gal., SAE 30
Gallon 112543G100 1 gal., SAE 30
Gallon Case 112543X100 (4)-1 gal., SAE 30
Quart 112543Q100 1 qt., SAE 30
Quart Case 112543C100 (12)-1 qt., SAE 30
Follow all safety precautions outlined in the QR-25 Series
instruction manual.
Do not operate this compressor without a totally enclosed
belt guard or any other required safety equipment.
ir used for breathing or food processing must meet
O.S.H. . 1910.134 or F.D. . 21 C.F.R. 178.3570 regulations.
CAUTION !
WARNING !
CRANKCASE LUBRICANT
CAPACITY
Refer to the QR-25 Series Instruction Manual for vital
lubrication information.
CAUTION !
Model Less Filter With Filter
QR-340 43/4 qts. (4.5 lit.) Add 10 oz. (296 ml)

QR 340 Quincy Compressor
50216-105, July 1999 3 3501 Wismann Lane, Quincy IL. - 62305-3116
CRANKSHAFT GROUP 110524
Item Part
Number Qty. Number Description
1 1 110519 crankshaft assembly includes:
1.1 1 110518R crankshaft
1.2 1 40775 bearing cone
1.3 1 2788 bearing cone
1.4 1 110234 orifice, 1/8 npt
1.5 2 121160 pipe plug, 1/8 npt
1.6 1 110705-F17 roll pin, 3/16 x 1.38
2 1 110523X sheave assembly includes:
2.1 1 5836R sheave, 19-1/2", 4 gr, B sect., CCW (N.S.S.: order 110523X)
2.2 2 124571-N22 hex. screw, 1/2-20 unf x 3.25, grade 5 (@ 90 ft.-lbs.)
2.3 2 124373-N02 square nut, 1/2-20 unf
3 1 1466 taper key
Item Part
Number Qty. Number Description
1 1 110519 crankshaft assembly includes:
1.1 1 110518R crankshaft
1.2 1 40775 bearing cone
1.3 1 2788 bearing cone
1.4 1 110234 orifice, 1/8 npt
1.5 2 121160 pipe plug, 1/8 npt
1.6 1 110705-F17 roll pin, 3/16 x 1.38
2 1 110975X sheave assembly includes:
2.1 1 110975R sheave, 16", 2 gr, B sect., CCW (N.S.S.: order 110975X)
2.2 2 124571-N22 hex. screw, 1/2-20 unf x 3.25, grade 5 (@ 90 ft.-lbs.)
2.3 2 124373-N02 square nut, 1/2-20 unf
3 1 1466 taper key
CRANKSHAFT GROUP 110524-001
(for basic compressors used on FE 340 units)
N.S.S. = Not Sold Separate
@ Indicates torque value in foot pounds (dry threads)
For reversal of compressor rotation refer to QR-25 instruction manual.
1.1
1.2
2.2 2.1
1.4
1.3
1.51.6
3
2.3

QR 340 Quincy Compressor
50216-105, July 1999 4 3501 Wismann Lane, Quincy IL. - 62305-3116
1 1 6904X crankcase assembly
1.1 1 6904R crankcase (N.S.S.; order 6904X)
1.2 1 3720 bearing cup
2 1 2057 pipe plug, 1/2 npt
3 * 1383 bearing adjustment shim, .005 steel
4 * 1383A bearing adjustment shim, .007 steel
5 * 1383B bearing adjustment shim, .020 steel
6 * 1383D bearing adjustment shim, .002 steel
7 1 6930 adjustment plate (.0015 / .003 crankshaft end play)
8 4 123478-L12 hex. screw, 3/8-16 unc x 1.00, grade 5 (@ 30 ft.-lbs.)
9 2 1315 inspection plate gasket
10 1 1249-1 inspection plate
11 1 6849-1 inspection plate
12 12 123478-K12 hex. screw, 5/16-18 unc x 1.00, grade 5 (@ 17ft.-lbs.)
13 1 6726X001 oil gauge assembly
13.1 1 5488-001 oil gauge rod (N.S.S.; order 6726X001)
13.2 1 6726 oil gauge knob (N.S.S.; order 6726X001)
13.3 2 123157-210 "o"ring, 1/8" wide x 1.00 o.d.
14 1 5783 breather ball
15 1 5932 drive pin
16 12 110428N031 flatwasher, 5/16
CRANKCASE GROUP 110628-002
Item Part
Number Qty. Number Description
13.2
8
7
65
13.1 431.2
13.3
12
16
11
9
2
12
16
10
9
1.1
14
15
N.S.S. = Not Sold Separate
@ Indicates torque value in foot pounds (dry threads)

QR 340 Quincy Compressor
50216-105, July 1999 5 3501 Wismann Lane, Quincy IL. - 62305-3116
BEARING CARRIER GROUP 110820-001
(with oil filter)

QR 340 Quincy Compressor
50216-105, July 1999 6 3501 Wismann Lane, Quincy IL. - 62305-3116
Item Part
Number Qty. Number Description
BEARING CARRIER GROUP 110820-001
(with oil filter)
1 1 110812-003 bearing carrier assembly
1.1 1 110812 bearing carrier assembly
includes:
1 2720 bearing cup
2 160005 bronze bushing
1.2 1 123157-152 "o"ring, 3/32 wide x 3.44 o.d.
1.3 1 123157-112 "o"ring, 3/32 wide x .69 o.d.
1.4 1 160002-001 bearing carrier driveshaft
1.5 1 160075-001 driveshaft key
1.6 1 160003 pump gerotor
1.7 1 6285 retaining ring
1.8 1 110813-001 oil pump housing
1.9 6 123777-J12 hex screw, 1/4-20 unc x 1.00, grade 5 (@ 6 ft.-lbs.)
1.10 2 2719 pipe plug, 1/4 npt
1.11 1 5489 adjustment screw
1.12 1 123157-011 "o"ring, 1/16 wide x .44 o.d. (oil pressure adjustment screw)
1.13 1 124369-P02 jamnut, 9/16-18 unf
1.14 1 1160 spring
1.15 1 112857 needle valve
1.16 1 121160 pipe plug, 1/8 npt
2 1 5502 bearing carrier gasket
3 8 123478-L12 hex. screw, 3/8-16 unc x 1.00, grade 5 (@ 30 ft.-lbs.)
4 1 110822 oil pressure gauge
5 1 6679 gasket, oil inlet bracket
6 1 110659 oil pickup tube
7 2 123115-06C lockwasher, 3/8
8 2 123478-L11 hex. screw, 3/8-16 unc x .88, grade 5 (@ 30 ft.-lbs.)
9 1 110825 oil filter stud
10 110814-001 oil filter (six pack)
160079 Oil Pump Repair Kit
(includes 1 each of items 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, & 1.12)
110812X003 Replacement Bearing Carrier Assembly
(includes 1 each of items 1, 2, 5, 9, & 1 oil filter)
Maintenance Parts
* Install with Teflon® tape.
*
*

QR 340 Quincy Compressor
50216-105, July 1999 7 3501 Wismann Lane, Quincy IL. - 62305-3116
BEARING CARRIER GROUP 110820
(less oil filter)

QR 340 Quincy Compressor
50216-105, July 1999 8 3501 Wismann Lane, Quincy IL. - 62305-3116
Item Part
Number Qty. Number Description
1 1 110812-002 bearing carrier assembly
1.1 1 110812 bearing carrier assembly
includes:
1 2720 bearing cup
2 160005 bronze bushing
1.2 1 123157-152 "o"ring, 3/32 wide x 3.44 o.d.
1.3 1 123157-112 "o"ring, 3/32 wide x .69 o.d.
1.4 1 160002-001 bearing carrier driveshaft
1.5 1 160075-001 driveshaft key
1.6 1 160003 pump gerotor
1.7 1 6285 retaining ring
1.8 1 110813 oil pump housing
1.9 6 123777-J12 hex screw, 1/4-20 unc x 1.00, grade 5 (@ 6 ft.-lbs.)
1.10 2 2719 pipe plug, 1/4 npt
1.11 1 5489 adjustment screw
1.12 1 123157-011 "o"ring, 1/16 wide x .44 o.d. (oil pressure adjustment screw)
1.13 1 124369-P02 jamnut, 9/16-18 unf
1.14 1 1160 spring
1.15 1 112857 needle valve
2 1 5502 bearing carrier gasket
3 8 123478-L12 hex. screw, 3/8-16 unc x 1.00, grade 5 (@ 30 ft.-lbs.)
4 1 110822 oil pressure gauge
5 1 6679 gasket, oil inlet bracket
6 1 110659 oil pickup tube
7 2 123115-06C lockwasher, 3/8
8 2 123478-L11 hex. screw, 3/8-16 unc x .88, grade 5 (@ 30 ft.-lbs.)
160079 Oil Pump Repair Kit
(includes 1 each of items 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, & 1.12)
110812X002 Replacement Bearing Carrier Assembly
(includes 1 each of items 1, 2, & 5)
BEARING CARRIER GROUP 110820
(less oil filter)
Maintenance Parts
* Install with Teflon® tape.
*
*

QR 340 Quincy Compressor
50216-105, July 1999 9 3501 Wismann Lane, Quincy IL. - 62305-3116
CONNECTING ROD & PISTON GROUP 110749*
(low pressure)
8
1.4
2
1.1 7
1.3
3
4
6
1.2
5
6
6
2
RING GAPS TO BE STAGGERED
WHEN ASSEMBLED.
PIP MARKS INDICATE
TOP SURFACE OF RING.

QR 340 Quincy Compressor
50216-105, July 1999 10 3501 Wismann Lane, Quincy IL. - 62305-3116
CONNECTING ROD & PISTON GROUP 110749*
(low pressure)
Item Part
Number Qty. Number Description
1 1 40081 connecting rod assembly (N.S.S.; order 6655X)
1.1 1 110802R connecting rod (N.S.S.; order 6655X)
1.2 1 6443 connecting rod bearing (N.S.S.; order 6443SR)
1.3 2 1344 connecting rod bolt, 7/16-20 unc x 3.25
1.4 2 1319 connecting rod bolt washer
2 2 8648 retaining ring
3 1 110146 piston pin
4 1 8642 piston
5 1 2033 oil ring
6 3 9666 piston ring
7 2 6656 connecting rod insert (sold in pairs only; see maintenance parts)
8 2 124471-M08 locknut, 7/16-20 unf (@ 40 ft.-lbs.)
7 1 6656PR inserts, connecting rod (1 pair, standard size)
7 1 6656-010PR inserts, connecting rod (1 pair, .010 undersize)
1.2 1 6443SR replacement connecting rod bearing
4 1 8642-010 piston, low pressure (.010 oversize)
4 1 8642-020 piston, low pressure (.020 oversize)
1 7595A Piston Ring Set (standard)
includes piston rings & oil ring
1 4450-010 Piston Ring Set (.010 oversize, light blue color code)
includes includes piston rings & oil ring
1 4450-020 Piston Ring Set (.020 oversize, yellow color code)
includes includes piston rings & oil ring
1 8642X Piston Assembly, low pressure (standard)
includes ring set, piston pin, retaining rings, & piston
8642X010 Piston Assembly, low pressure (.010 oversize)
includes ring set, piston pin, retaining rings, & piston
8642X020 Piston Assembly, low pressure (.020 oversize)
includes ring set, piston pin, retaining rings, & piston
6655X Replacement Connecting Rod Assembly
includes connecting rod assembly, connecting rod inserts, & locknuts
Maintenance Parts
* 2 of 110749 Connecting Rod & Piston Group required per compressor
N.S.S. = Not Sold Separate
@ Indicates torque value in foot pounds (dry threads)

QR 340 Quincy Compressor
50216-105, July 1999 11 3501 Wismann Lane, Quincy IL. - 62305-3116
CONNECTING ROD & PISTON GROUP 110750*
(high pressure)
9
1.4
1.1
2
8
4
2
3
5
6
1.2
5
7
7
7
RING GAPS TO BE STAGGERED
WHEN ASSEMBLED.
PIP MARKS INDICATE
TOP SURFACE OF RING.
1.3
1.5

QR 340 Quincy Compressor
50216-105, July 1999 12 3501 Wismann Lane, Quincy IL. - 62305-3116
CONNECTING ROD & PISTON GROUP 110750*
(high pressure)
Item Part
Number Qty. Number Description
1 1 110804 connecting rod assembly (N.S.S.; order 110804X)
1.1 1 110802 connecting rod (N.S.S.; order 110804X)
1.2 2 110799-010 needle bearing
1.3 2 1344 connecting rod bolt, 7/16-20 unc x 3.25
1.4 2 1319 connecting rod bolt washer
1.5 1 110801-001 orifice plug
2 2 8648 retaining ring
3 1 110190-008 piston pin
4 1 2008-001 piston
5 2 6451 oil ring rail
6 1 6450 expander ring
7 3 1648 piston ring
8 2 6656 connecting rod insert (sold in pairs only; see maintenance parts)
9 2 124471-M08 locknut, 7/16-20 unf (@ 40 ft.-lbs.)
8 1 6656PR inserts, connecting rod (1 pair, standard size)
8 1 6656-010PR inserts, connecting rod (1 pair, .010 undersize)
4 1 2008-011 piston, high pressure (.010 oversize)
4 1 2008-021 piston, high pressure (.020 oversize)
1 6452A Piston Ring Set (standard)
includes piston rings, oil ring rails & expander
1 4425-010 Piston Ring Set (.010 oversize, light blue color code)
includes includes piston rings, oil ring rails & expander
1 4425-020 Piston Ring Set (.020 oversize, yellow color code)
includes includes piston rings, oil ring rails & expander
1 2008X001 Piston Assembly, high pressure (standard)
includes ring set, piston pin, retaining rings, & piston
2008X011 Piston Assembly, high pressure (.010 oversize)
includes ring set, piston pin, retaining rings, & piston
2008X021 Piston Assembly, high pressure (.020 oversize)
includes ring set, piston pin, retaining rings, & piston
110804X Replacement Connecting Rod Assembly
includes connecting rod assembly, connecting rod inserts, & locknuts
N.S.S. = Not Sold Separate
@ Indicates torque value in foot pounds (dry threads)
Maintenance Parts

QR 340 Quincy Compressor
50216-105, July 1999 13 3501 Wismann Lane, Quincy IL. - 62305-3116
CYLINDER & HEAD GROUP 110751-001
(control version P)

QR 340 Quincy Compressor
50216-105, July 1999 14 3501 Wismann Lane, Quincy IL. - 62305-3116
CYLINDER & HEAD GROUP 110751-001
(control version P)
Item Part
Number Qty. Number Description
1 1 6661P head assembly, standard pressure (see pages 17 & 18 for parts breakdown)
or
1 1 6661PHP head assembly, high pressure (see pages 17 & 18 for parts breakdown)
2 1 6680 cylinder to head gasket
3 1 6654-1 compressor cylinder (standard pressure rated compressors)
or
3 1 6654-1HPS compressor cylinder (high pressure rated compressors)
4 1 5827 gasket, cylinder to crankcase
5 2 5702 intercooler to head gasket
6 1 2030 intercooler
7 2 5828 gasket, companion flange
8 1 5501 discharge flange
9 1 6977 companion flange
10 8 123478-M15 hex. screw, 7/16-14 unc x 1.50, grade 5 (@ 50 ft.-lbs.)
11 1 110377F150 air filter
11 1 110377H150 hooded air filter
11 1 110377S150 hooded air filter/silencer
12 6 123115-05C lockwasher, 5/16
13 6 123478-K12 hex. screw, 5/16-18 unc x 1.00, grade 5 (@ 17 ft.-lbs.)
14 5 1478-1 flatwasher
15 5 5863 counterbore screw, 1/2-13 unc x 4.25, grade 8 (@ 65 ft.-lbs.)
16 7 90386-N14 counterbore screw, 1/2-13 unc x 1.25, grade 8 (@ 65 ft.-lbs.)
17 15 123115-08C lockwasher, 1/2
18 8 123478-N14 hex. screw, 1/2-13 unc x 1.25, grade 5 ( @ 75 ft.-lbs.)
19 1 4926-X intercooler bracket
20 1 2359 intercooler bracket clamp
21 1 5387 socket head screw, 3/8-16 unc x .75
22 1 123115-06C lockwasher, 3/8
23 1 124471-K08 locknut, 5/16-24 unf
24 1 2728 tube fitting, 90° male elbow, 3/8 tube x 3/8 npt
25 2 ft. 110515-038 copper tube, 3/8 o.d.
26 1 110377E100 air filter element, (fits110377F100 & 110377S100 filter)
6661X31P Replacement Head Assembly
includes head assembly (standard pressure), intercooler gaskets & head gasket
Maintenance Parts
@ Indicates torque value (dry threads). Tighten all bolts & capscrews in any bolt pattern, evenly bringing each bolt to torque in equal
increments, while moving about the bolt pattern. This is particularly true of connecting rod & head bolts.

QR 340 Quincy Compressor
50216-105, July 1999 15 3501 Wismann Lane, Quincy IL. - 62305-3116
CYLINDER & HEAD GROUP 110752-001
(control versions L, S, LS & LVD)

QR 340 Quincy Compressor
50216-105, July 1999 16 3501 Wismann Lane, Quincy IL. - 62305-3116
CYLINDER & HEAD GROUP 110752-001
(control versions L, S, LS & LVD)
Item Part
Number Qty. Number Description
1 1 6661UU head assembly (standard pressure)
or
1 1 6661UUHP head assembly (high pressure)
2 1 6680 cylinder to head gasket
3 1 6654-1 compressor cylinder
4 1 5827 gasket, cylinder to crankcase
5 2 5702 intercooler to head gasket
6 1 2030 intercooler
7 2 5828 gasket, companion flange
8 1 5501 discharge flange
9 1 6977 companion flange
10 8 123478-M15 hex. screw, 7/16-14 unc x 1.50, grade 5 (@ 50 ft.-lbs.)
11 1 110377F150 air filter
or
11 1 110377H150 hooded air filter
or
11 1 110377S150 hooded air filter/silencer
12 6 123115-05C lockwasher, 5/16
13 6 123478-K12 hex. screw, 5/16-18 unc x 1.00, grade 5 (@ 17 ft.-lbs.)
14 5 1478-1 flatwasher
15 5 5863 counterbore screw, 1/2-13 unc x 4.25, grade 8 (@ 65 ft.-lbs.)
16 7 90386-N14 counterbore screw, 1/2-13 unc x 1.25, grade 8 (@ 65 ft.-lbs.)
17 15 123115-08C lockwasher, 1/2
18 8 123478-N15 hex. screw, 1/2-13 unc x 1.50, grade 5 ( @ 75 ft.-lbs.)
19 1 4926-X intercooler bracket
20 1 2359 intercooler bracket clamp
21 1 5387 socket head screw, 3/8-16 unc x .75
22 1 123115-06C lockwasher, 3/8
23 1 124471-K08 locknut, 5/16-24 unf
24 1 2728 tube fitting, 90° male elbow, 3/8 tube x 3/8 npt
25 2 ft. 110515-038 copper tube, 3/8 o.d.
26 1 110377E100 air filter element, (fits110377F100 & 110377S100 filter)
6661X31L Replacement Head Assembly
includes head assembly, cylinder & head gaskets, tube fittings & copper tubing
Maintenance Parts
*As viewed facing the compressor from the sheave side.
N.S.S. = Not Sold Separate
@ Indicates torque value (dry threads)
Note: Tighten all bolts & capscrews in any bolt pattern, evenly bringing each bolt to torque in equal increments, while moving about
the bolt pattern. This is particularly true of connecting rod & head bolts.

QR 340 Quincy Compressor
50216-105, July 1999 17 3501 Wismann Lane, Quincy IL. - 62305-3116
HEAD ASSEMBLY 6661P
(control version P)
11
4
2
5
13
7
9
12
10
12
10
9
7
5
3
44
3
5
8
6
5
3.1
3.4
3.2 3.3
4
10
12
8
65
2.2
2.5
5
2
4
2.4
2.3
4
2.1
1

QR 340 Quincy Compressor
50216-105, July 1999 18 3501 Wismann Lane, Quincy IL. - 62305-3116
Item Part
Number Qty. Number Description
HEAD ASSEMBLY 6661P
(control version P)
1 1 6661 compressor head
or
1 1 6661HP compressor head (high pressure rated compressor)
2 3 7277X1 suction valve assembly
2.1 1 7277 valve bumper
2.2 1 1815 seat
2.3 1 1846 valve disc
2.4 1 7270 valve spring
2.5 1 1849 stud
3 3 7271X002 discharge valve
3.1 1 7271-002 discharge valve bumper
3.2 1 1819-002 discharge valve seat
3.3 1 1846 valve disc
3.4 1 7270 valve spring
4 6 1848 gasket, valve
5 6 5911 valve spacer
6 2 6682 valve cover gasket
7 2 1852 gasket, valve cover
8 2 6673 cover plate
9 2 5906 valve cover plate
10 6 114545-R15 bolt and nut assembly, 3/4-16 unf x 1.50, grade 5 (@ 60 ft.-lbs.)
11 1 2614 tube fitting, 90° male elbow, 3/8 tube x 1/4 npt
12 20 7480 hex. screw, 7/16-14 unc x 1.38, grade 5 (@ 50 ft.-lbs.)
13 1 2961-100 pressure relief valve
3 7277X Replacement Suction Valve Assembly
includes suction valve assembly and gasket
3 7271X02 Replacement Discharge Valve Assembly
includes discharge valve assembly and gasket
Maintenance Parts
* 6661 has a standard maximum pressure rating of 200 p.s.i.g. 6661HP has a high pressure rating of 500 p.s.i.g. maximum. They
consist of identical parts with exception to the compressor head.
‡ Tighten & torque valve cover plate screws (item 12) before tightening valve clamp screws (item 10).
@ Indicates torque value (dry threads). Tighten multiple bolts, capscrews & hex nuts in a criss-cross or alternating pattern. Bring
each fastener to the recommended torque specification in even increments.
*
*
‡
‡

QR 340 Quincy Compressor
50216-105, July 1999 19 3501 Wismann Lane, Quincy IL. - 62305-3116
HEAD ASSEMBLY 6661UU
(control versions L, S, LS & LVD)