Quincy QR-25 Series, Manual

Page: 21 / 31

QR 340 Quincy Compressor
50216-105, July 1999 20 3501 Wismann Lane, Quincy IL. - 62305-3116
HEAD ASSEMBLY 6661UU
(control versions L, S, LS & LVD)
Item Part Part
Number Qty. Number Number Description
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 assembly
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 4 5911 valve spacer
6 2 6682 valve cover gasket
7 2 1852 gasket, valve cover
8 1 5906 valve cover plate
9 1 6673 cover plate
10 4 114545-R15 bolt and nut assembly, 3/4-16 unf x 1.50, grade 5 (@ 60 ft.-lbs.)
11 1 2961-100 pressure relief valve
12 20 7480 hex. screw, 7/16-14 unc x 1.38, grade 5 (@ 50 ft.-lbs.)
13 6 6910 valve spring
14 6 1857 valve pin
15 2 6925 platform
16 2 6926 valve retainer
17 2 6912-001 unloader pin
18 2 7532X unloader piston assembly
19 1 6928 plate
20 1 6927 valve cover plate
21 2 3008 holddown screw/ (@ 60 ft.-lbs.)
22 2 1556 gasket, valve
23 1 40055 unloader assembly (@ 75 ft.-lbs.) (N.S.S.; order 7483X)
23.1 1 7483 unloader body
23.2 1 1855 diaphragm
23.3 1 1818B diaphragm cover plate
23.4 1 5910 diaphragm disc
23.5 6 7499 hex. screw, 1/4-20 unc x .75, grade 2 (@ 72 in.-lbs.)
24 1 40192 unloader assembly (@ 75 ft.-lbs.), (N.S.S.; order 8272X)
24.1 1 8272 unloader body
24.2 1 1855 diaphragm
24.3 1 1818B diaphragm cover plate
24.4 1 5910 diaphragm disc
24.5 6 7499 hex. screw, 1/4-20 unc x .75, grade 2 (@ 72 in.-lbs.)
25 1 110594-005 tube fitting, male connector, 1/4 tube x 1/4 npt
26 1 110515-025 copper tube, 1/4 o.d.
27 1 1642 tube fitting, 90° male elbow, 1/4 tube x 1/8 npt
28 1 2614 tube fitting, 90° male elbow, 3/8 tube x 1/4 npt
7277X Replacement Suction Valve Assembly
includes (1 each) items 2 & 4
7277XU Replacement Suction Valve Assembly
includes (1) item 2, (1) item 4, (3) item 13 & (3) item 14
7271X02 Replacement Discharge Valve Assembly
includes (1 each) items 3 & 4
7483X Replacement Unloader Assembly
includes (1 each) items 18, 22 & 23
8272X Replacement Unloader Assembly
includes (1 each) items 18, 22 & 24
*
*
‡
‡
Maintenance Parts
* See page 18 for footnotes