QT 7.5 Parts Manual

QT-7.5 Industrial Quincy Compressor
2022207901, June 2018 1
INTRODUCTION
This manual provides information for the Model QT-
7.5 reciprocating compressor, per Record of Change
202.
The Model QT-7.5 is an aircooled, two stage, two
cylinder, splash lubricated compressor, with up to 175
PSI continuous pressure capability. It has a 4.5" low
pressure bore and a 2.50" high pressure bore, with a 3"
stroke. This compressor can be run at 500-1060 RPM.
Optional head unloaders are available.
CHANGES
since previous printing dated June 2018:
The part numbers within the manual have been
updated to the current 10-digit part numbers and
there are new valve plate gasket part numbers.
TABLE OF CONTENTS
Overhaul Kit ............................................................1
Gasket Set ...............................................................1
Recommended Spare Parts ................................... 1
Serial Number Identication .................................. 2
Ordering Replacement Parts .................................2
Quin-Cip Lubricant .................................................2
Crankcase Lubricant Capacity ..............................2
Crankshaft Groups .................................................3
Crankcase Group....................................................4
Connecting Rod & Piston Groups .....................5-6
Cylinder & Head Groups .....................................7-8
Control Piping Schematics .................................... 9
Pilot Valves............................................................10
Pilot Valve Repair Kit............................................10
Di󰀨erential Setting Chart .....................................12
Suction Valve Unloader Assemblies .................. 11
Decals .................................................................... 11
Typical Unit Repair Parts List .........................12-14
Item Part
# Qty. Number Description
1 2022111301 piston ring set
1 2022111401 piston ring set
1 2022106800 gasket set
1 2024403751 valve plate assembly
1 2023400852 air filter element
1 2025024610 piston pin
1 2025024616 piston pin
1 2023402501 crankcase breather
1 2024408302 connecting rod assembly, LP
1 2024408306 connecting rod assembly, HP
2 2025027201 piston pin plug, .88 dia.
2 2025027202 piston pin plug, .62 dia.
Overhaul Kit 2022157501
Item Part
# Qty. Number Description
1 2023400852 air filter element, (fits
2023400802, 2023400823 and
2023400829 air filters)
1 2022106800 gasket set
1 2022128101 replacement valve assembly
Recommended Spare Parts
Item Part
# Qty. Number Description
Gasket Set 2022106800
1 2024703501 gasket, valve plate to head
1 2024704501 gasket, cylinder to valve plate
1 2024704300 gasket, crankcase to cylinder
1 2024703800 gasket, bearing carrier
1 2024719400 oil seal
6 2014706635 spring washer
6 2022203100 head bolts