York YDHF-44 - User Manual

SERVICE INSTRUCTION
CENTRIFUGAL COMPRESSORS
Supersedes: 160.49-M1 (1292)
Form 160.49-M1 (601)
USED WITH YORK MODEL YK
CENTRIFUGAL LIQUID CHILLERS
26439A
COMPRESSOR COMPRESSOR
MODEL CODE
YDHF-39 P1
YDHF-40 P2
YDHF-42 P3
YDHF-44 P4
YDHA-36 & LHA-36 G3
YDHA-41 & LHA-41 G4
YDHA-46 & LHA-46 H0
YDHA-50N & LHA-50N H1
YDHA-50W & LHA-50W H1
YDHB-57, LHB-57, HA-57 H2
YDHB-61 H3
YDHD-46 H4
YDHD-50N & 50W H5
YDHD-57 H6
YDHD-59 H7
YDHD-61 H8
YDHA-65 & LHA-65 J1
YDHA-73 & LHA-73 J2
YDHA-81 & LHA-81 J3
YDHA-90 & LHA-90 J4
(Also see NOMENCLATURE, page 5)

Summary

General Safety Guidelines

Section 2 Compressor Service

Service Guidelines

Cleaning and Checking Wearing Parts

Section 3 Oil Pump Service

Motor Removal and Replacement

Removal (Motor Only)

Details on safely removing the motor from the compressor unit.

Close-Coupled Models

Open-Drive Models

Shaft Seals

Cartridge Type Seal Removal

Instructions for removing the original design carbon ring cartridge type shaft seal.

Cartridge Type Seal Installation

Instructions for installing the carbon ring cartridge type shaft seal.

Bellows Type Shaft Seals

Information on bellows-type shaft seals used in newer compressors.

Disassembly of Rotor Support

Removing Rotor Supports from Rotor Scroll

Removing the Impeller

Impeller Removal (HA36 & HA41 Compressors)

Specific instructions for removing impellers on HA36 and HA41 models.

Impeller Removal (HF Compressors)

Specific instructions for removing impellers on HF compressors.

Removing Balance Piston Seal and Diffuser Plate

Removing Front Low-Speed Bearings

Removing Front High-Speed Bearings

Removing Bearing Housing and Gears

Bearing Housing Removal

Gear Removal

Rear Low-Speed Bearing

Removal

Installation

Rear High-Speed Bearing Components

Installing Front High-Speed Bearings

Installing Front Low-Speed Bearings

Installing Balance Piston and Diffuser Plate

Installing the Impeller

Impeller Installation (Sizes 46 & Larger)

Steps for installing impellers sized 46 and larger.

Impeller Installation (HA36 & HA41)

Installation procedure for impellers on HA36 and HA41 compressors.

Impeller Installation (HF Compressors)

Installation procedure for impellers on HF compressors.

Replacing Control Shaft Assembly

Removing Oil Pump from the Oil Sump

York YDHF-44 Specifications

General

Brand	York
Model	YDHF-44
Category	Air Compressor
Language	English