Danfoss T90 Series Manuals

Manuals and User Guides for Danfoss T90 Series. We have 1 Danfoss T90 Series manual available for free PDF download: Service Manual

Danfoss T90 Series Service Manual (70 pages)

Axial Piston Pumps

Brand: Danfoss | Category: Water Pump | Size: 6.13 MB

Table of Contents
3
Overview
5
Warranty
5
General Instructions
5
Remove the Unit
5
Replace All O-Rings and Gaskets
5
Safety Precautions
6
Unintended Machine Movement
6
Flammable Cleaning Solvents
6
Fluid under Pressure
6
Personal Safety
6
Symbols Used in Danfoss Literature
7
Design
7
The System Circuit
9
The Basic Closed Circuit
9
Case Drain and Heat Exchanger
9
Operation
12
T90 Charge Pump Operation
12
T90 Charge Relief Valve Operation
12
T90 Multi-Function Valve Operation
12
T90 Pressure Limiter/High Pressure Relief Valve Operation
13
T90 System Check Valve Operation
13
T90 Bypass Valves Operation
13
T90 Speed Sensor Operation
14
T90 Filtration Options
14
T90 MDC Operation
14
T90 MDC Solenoid Override Valve Operation
15
Neutral Start Switch (NSS) for MDC
15
T90 HDC Operation
15
T90 3-Position (FNR) Electric Control Operation
15
High Current Electrical Displacement Control (HCEDC)
15
HCEDC Principle
15
HCEDC Operation
16
Manual Override (MOR)
16
Operating Parameters
18
T90 Input Speed
18
T90 System Pressure
18
T90 Charge Pressure
18
T90 Charge Inlet Pressure
19
Case Pressure
19
Temperature and Viscosity
19
Fluid and Filter Recommendations
19
Technical Specifications
21
Overview
21
Features and Options
21
Operating Parameters
21
Fluid Specifications
21
Initial Start-Up Procedure
23
General
23
Start-Up Procedure
23
Pressure Measurement
24
Required Tools
24
Port Locations and Gauge Installation
24
Troubleshooting
26
Overview
26
Neutral Difficult or Impossible to Find
26
System Operating Hot
26
Transmission Operates Normally in One Direction Only
26
System will Not Operate in Either Direction
27
Low Motor Output Torque
27
Improper Motor Output Speed
27
System Noise or Vibration
28
System Response Is Sluggish
28
Adjustments
29
Standard Procedures, Inspections, and Adjustments
29
Charge Pressure Relief Valve Adjustment
29
Multi-Function Valve Pressure Adjustment
31
Engaging the Bypass Function
32
Displacement Limiter Adjustment
33
Control Neutral Adjustment
34
Verify Neutral Setting
35
Servo Adjustment Side M4
35
Standard Manual Displacement Control (MDC) Adjustment
36
MDC Neutral Start Switch (NSS) Adjustments
36
Checking Switch Continuity
40
Hydraulic Displacement Control (HDC) and Electric Displacement Control (EDC) Adjustment
41
Speed Sensor Adjustment
42
Minor Repair
43
Standard Procedures
43
Shaft Seal and Shaft Replacement
43
Multi-Function Valve Cartridges
46
Charge Pressure Relief Valve
48
Adding an Auxiliary Pad to a Pump Previously Without One
50
Auxiliary Pad
51
Charge Pump
52
Integral Charge Pressure Filter Replacement
55
Pump Control Cover Plate
57
Displacement Control Orifices
57
Displacement Control Orifice Check Valve
58
Manual Displacement Control (MDC)
58
Solenoid Override Valve for MDC
60
Solenoid Override Valve for MDC with Pressure Released Brake
60
Hydraulic and Electric Displacement Controls
61
3-Position (FNR) Electric Control
62
Displacement Control Filter Screens
64
Speed Sensor
64
Control Module Repair
65
Replace Control Solenoids/Actuator Housing
67
Torque Chart
68
Fastener Size and Torque Chart
68
Plug Size and Torque Chart
68
Fasteners and Plugs
69

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Danfoss T90 Series Service Manual (70 pages)

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