Sd Compressor Service Guide

SD Compressor
Service Guide

Table of Contents
1. Compressor Models Covered
2. Compressor Nomenclature
3. Cautionary Information
3.1 Pressure Release
3.2 Recovery of Refrigerant
3.3 Handling of Refrigerant
3.4 Ventilation
3.5 Avoid use of
3.6 Warranty for Recycled Refrigerant
4. R134a Information
4.1 R134a/PAG Oil Handling
4.2 Table of Saturation Temperatures and Pressure
5.Compressor Identification
5.1 Label
5.2 Date Codes
6. Application Specifications
6.1 Belt Tension
6.2 Speed Rating
6.3 Basic Specifications
6.4 Assembly Torques
6.5 Mounting
6.5.1 Compressor Rotation
6.5.2 Ear Deflection Bending
6.6 Recommended Pressure and Temperature Conditions
6.6.1 Discharge Gas Condition
6.6.2 Suction Gas Condition
6.6.3 Ambient Temperature
6.7 Clutch
6.8 OilCharge
6.8.1 Oil Flow Theory
6.8.2 Oil Charging
6.8.2.1 Passenger Car Light Duty Truck Single Evaporator
6.8.2.2 Dual Evaporator Long Hose Systems
6.8.2.3 System Refrigerant charges greater than 56 oz (1600g)
7. Diagnosis Confirmation Of Compressor Failure
7.1 Compressor Rotation
7.2 Clutch Inspection
7.2.1 Voltage Test
7.2.2 Air Gap Test
7.2.3 Coil Resistance Test
7.3 Pressure or PumpingTest
7.4 Leak Checking
7.4.1 Visual
7.4.2 Soap bubble
7.4.3 Electronic
7.4.4 Dyes
7.5 Noise
7.5.1 Non Compressor
7.5.2Compressor
2

8. Compressor Repair
8.1 Clutch Removal
8.2 Clutch Installation
8.3 Cylinder Head Replacement
9. Compressor Replacement
9.1 Contamination Inspection
9.2 Oil Amount (No Contamination)
9.3 Oil Amount (Flushed System)
10. Service Procedures
10.1Flushing
10.1.1 Equipment types
10.1.2 Safety
10.1.3 Acceptable Flushing Fluids
10.1.3 Components to Flush
10.1.4 Flushing Tips
10.1.5 Removal of Residual Flushing Fluid
10.2 Evacuation
10.3 Refrigerant Charge
10.3.1 Charging Systems
10.3.2 High Side Charging
10.3.3 Low Side Charging
10.4 System Oil Balance
10.4.1 Oil flow
10.4.2 In Laboratory Oil Amount Determination
10.4.3 OilChecking is Not Required Under Normal Conditions
10.4.4 Circumstances When Oil Addition or Balancing is Required
10.4.5 Oil Addition during Component Replacement
11. Warranty
11.1 Return Process
11.2 Warranty Duration
12. Compressor Failure Causes
11.1 Overheating
11.2 Contamination
12.3 Clutch Slippage
12.4 Handling or Impact Damage
13. Tools
13.1 Special Service Tools
13.2 Standard Tools\

3

1.0 Compressor Models Covered
Type

R-134a
SD7B10
SD7H13
SD7H15/ HD, SHD
SD7B10 / SD5H09
SD5H11
SD5H14

7 Cylinder

5 Cylinder

R-12
SDB-706
SD-708
SD-709
SD-505
SD-507
SD-508
SD-510

2.0 Compressor Nomenclature
R-134a

SD 7 H 15 HD

SD
Sanden
wobble plate
piston type
compressor

7

H

Number
of
pistons

15

Port
Location
B- Body
H- HeadHD

Approximate
Displacement
In CC’s divided by 10

HD- Heavy Duty
SHD- Sealed HD

R-12

SD-709
SD
Sanden
wobble plate
piston type
compressor

7
Number
of pistons

09
Approximate
Displacement
In Cubic Inches

4

3.0 Cautionary Information
3.1 Pressure Release
•

•

Before disconnecting any lines or removing the oil plug, always make sure refrigerant
hasbeen removed from the A/C system by recovering it with the appropriate recovery
equipment.
When working on compressors, separate from the system, always be sure to relieve
internal pressure first. Internal compressor pressure can be relieved by removing
shipping caps / pads from both ports.

3.2 Recovery of Refrigerant
•

Never discharge refrigerant to the atmosphere. Always use approvedrefrigerant
recovery / recycling equipment to capture refrigerant which is removed from the A/C
system. Do not mix refrigerants in the same piece of equipment; one should be
designated for R-12 and another for R-134a.

3.3 Handling of Refrigerant
•

Always wear eye and hand protection when working on an A/C system or compressor.
Liquid refrigerant can cause frostbite and / or blindness....