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Series 90
Danfoss Series 90 User Manual
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Design
Series 90 pump cross-section
P106 648E
Slider block
Servo piston
Servo arm
Displacement control
Cradle bearing
Charge pump
Swashplate
Cradle guide
Feedback linkage
Roller bearing
Shaft
Piston
Slipper
Valv
e plate
Cylinder block
Input shaft
Rear
bushing
Bushing
seal
Typical name plate
Model-No./Ident-No
.
Model Code
Serial-No.
Made in USA
Place of Manufacture
Model
Number
Serial
Number
Model
Code
A - 88 - 126 - 67890
501829
P108494E
90L055 KA 1 N
6 S 3 C6 C 03
NNN 35 35 24
Series 90 pumps are also manufactured in Europe and China. Place of manufacture shown on nameplate
will correspond with the actual place of manufacture.
Pictorial Circuit Diagram
This configuration shows a hydrostatic transmission using a Series 90 axial piston variable displacement
pump and a Series 90 fixed displacement motor.
Technical Information
Series 90 Axial Piston Pumps
General Description
6
520L0603 •
Rev 0804
•
March 2016
5
7
Table of Contents
Default Chapter
3
Table of Contents
3
General Description
5
Series 90 Family of Pumps and Motors
5
PLUS+1 Compliant Controls and Sensors
5
March
5
Design
6
Pictorial Circuit Diagram
6
System Schematic
7
Technical Specifications
8
General Specifications
8
Features and Options
8
Operating Parameters
9
Fluid Specifications
9
Overview
10
Input Speed
10
Independant Braking System
10
System Pressure
10
Servo Pressure
11
Charge Pressure
11
Case Pressure
11
External Shaft Seal Pressure
12
Temperature and Viscosity
12
System Design Parameters
13
Filtration System
13
Filtration Options
13
Suction Filtration - Option S
13
Charge Pressure Filtration (Partial Charge Pump Flow)
14
Remote Charge Pressure Filtration
14
Fluid Selection
15
Reservoir
15
Case Drain
15
Pump Life
16
Charge Pump
16
Charge Pump Sizing/Selection
16
Bearing Loads and Life
16
Applications with External Shaft Loads
17
Understanding and Minimizing System Noise
17
Sizing Equations
18
Mounting Flange Loads
18
Master Model Code
21
Series 90 Master Model Code
21
Control Options
26
3-Position (FNR) Electric Control - DC, DD
26
Response Time
27
Electric Displacement Control (EDC), Options KA, KP, KT
27
Features and Benefits
28
Response Time
31
Pump Output Flow Direction Vs. Control Current
31
Manual over Ride (MOR)
31
Hydraulic Displacement Control (HDC), Option HF
32
Operation
32
Features and Benefits
32
Response Time
33
Pump Output Flow Direction Vs. Control Pressure
34
Manual Displacement Control (MDC), Options MA, MB
34
Features and Benefits
34
External Control Handle Requirements
35
Response Time
36
Pump Output Flow Direction Vs. Control Handle Rotation
36
MDC with Neutral Start Switch (NSS)
37
Non Feedback Proportional Electric Control (NFPE)
37
Control Response
37
NFPE Control Used with a Danfoss Microcontroller
38
Input Signal Requirements
39
Features and Options
40
Multi-Function Valves
40
Overpressure Protection
40
Pressure Limiting Function
40
Bypass Function
41
Auxiliary Mounting Pads
41
Mating Pump Requirements
41
Displacement Limiter
42
Shaft Torque
43
Shaft Torque and Spline Lubrication
43
Shaft Torque for Tapered Shafts
44
Shaft Availability and Torque Ratings
44
Tapered Shaft Customer Acknowledgement
45
Charge Pump
46
Charge Pump Sizing/Selection
46
Charge Pump Flow and Power Curves
46
Speed Sensor
47
Connector Pin Assignments
49
Installation Drawings
50
Frame Size 042
50
Frame Size 055
53
Frame Size 075
57
Frame Size 075 NFPE Options FK, FL, FM, FN
60
Frame Size 100
65
Frame Size 130
70
Frame Size 180
74
Frame Size 250
78
Cover Plate
82
3-Position (F-N-R) Electric Control
82
Electric Displacement Control (EDC) with MS-Connector or Packard® Connector
83
Hydraulic Displacement Control (HDC)
84
Manual Displacement Control (MDC) with Neutral Start Switch
84
Electrohydraulic Displacement Control (NFPE)(Except 075 NFPE)
85
Integral Pressure Filter
86
Remote Pressure - Without Filter
86
5
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Danfoss Series 90 Specifications
General
Brand
Danfoss
Model
Series 90
Category
Water Pump
Language
English
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