PREVOST X3-45 COMMUTER User Manual

SECTION 22: HEATING AND AIR CONDITIONING
14
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual First release Oct 2020
4. HVAC SYSTEM COMPONENTS
4.1 COMPRESSOR – CENTRAL A/C
SYSTEM
The central system is equipped with a Bitzer
4-cylinder model 4NFCY compressor. Refer to
paragraph 7 “Specifications” at the end of this
section.
For complete information on Bitzer A/C
compressor maintenance, installation, torque
chart, approved oils, refer to the following Bitzer
manuals found on your Technical Publications
USB flash drive and on the Prevost Technical
Publications web site.
• Bitzer kw-540-1 Maintenance Instruction
• Bitzer kb-540-3 Operating Instructions
• Bitzer kw-541-2 Exchanging Shaft Seal
• Bitzer kw-555-3 Tightening Torques
• Bitzer kt-100-3 Capacity Control
(unloader)
• Bitzer ke-540-7 Spare Parts List
• Bitzer kt-510-5 Tech Info oils
4.1.1 Suction and Discharge Hose
Connection
1. Before connecting suction and discharge
refrigerant hoses to the compressor, apply
POE compressor oil on new gaskets, do not
dip in oil.
2. Tighten hose flange by hand in 2
sequences.
3. Apply a final torque on cap screws.
TORQUE: 31-35 lb-ft (42-47 Nm)
FIGURE 15: SUCTION AND DISCHARGE HOSE
FIGURE 16: BITZER COMPRESSOR
4.1.2 Electro-Magnetic Clutch
For the Lang KK73.1 electromagnetic clutch
removal & installation procedure, refer to
Maintenance Information MI18-37.
For Lang KK73.1 electromagnetic clutch service
manual or bearing replacement procedure, refer
to the following manuals found on your
Technical Publications USB flash drive and on
the Prevost Technical Publications site.
• Lang clutch KK73.1 bearing replacement
• Lang operating instr_KK73 1_2
• Lang Service manual_KK73.1_2
• Bitzer Maintenance Instruction kw-540-1
4.1.3 Maintenance - Shaft Seal Oil
Collecting tube Drain
The shaft seal oil tube collects oil seeping
through the felt shaft seal. Remove the tube plug
and drain the oil into a container for disposal.
Replace the cap on the tube and replace the
tube into the clip bracket.

PREVOST X3-45 COMMUTER Specifications

General

Engine	Volvo D13
Transmission	Allison B500
Fuel Type	Diesel
Length	45 ft (13.7 m)
Width	102 in (2.6 m)
Horsepower	500 hp
GVWR	54, 000 lbs
Height	141 in