Service Manifold Manual
Table Of Contents
- Technical Support
- Preface
- Introduction
- About the Hydraulic Service Manifold (HSM)
- 293.32 HSM Component Identification
- HSM Fluid Flow
- HSM Filtering
- HSM Pressure Control
- About HSM Pilot Pressure
- HSM Accumulators
- HSM Slow Turn-On
- HSM Rapid Pressure Reduction
- Model 239.32 HSM Hydraulic Schematic
- Model 293.32 HSM Dimensions
- Model 293.32 HSM Specifications
- Safety
- General Safety Practices: Hydraulic Power Units and Hydraulic Service Manifolds
- Hazard Placard Placement
- Read all manuals
- Locate and read hazard placards/labels
- Specimen Temperature Changes
- Know facility safe procedures
- Know controls
- Have first aid available
- Know potential crush and pinch points
- Be aware of component movement with hydraulics off
- Know electrical hazards
- Keep bystanders safely away
- Wear proper clothing
- Remove flammable fluids
- Check bolt ratings and torques
- Practice good housekeeping
- Protect hoses and cables
- Provide proper hydraulic fluid filtration
- Protect accumulators from moving objects
- Do not exceed the Maximum Supply Pressure
- Do not disable safety devices
- Use appropriately sized fuses
- Provide adequate lighting
- Provide means to access out-of-reach components
- Wear appropriate personal protection
- Handle chemicals safely
- Know system interlocks
- Know system limits
- Do not disturb sensors
- Ensure secure cables
- Stay alert
- Contain small leaks
- Stay clear of moving equipment/avoid crush points
- Know the causes of unexpected actuator motions
- Do not use RF transmitters
- Know compressed gas hazards
- General Safety Practices: Hydraulic Power Units and Hydraulic Service Manifolds
- Installation
- Operation
- Maintenance

HSM Site Preparation
Consider the following items for site preparation:
• The HSM must be installed in an area that is protected from extreme temperature and humidity. An
environment with a non-corrosive atmosphere is recommended.
• The HSM must be located as close as possible to the servovalve(s) it supplies. The maximum allowable
distance must take the specific system dynamic flow transient requirements and turn-on/turn-off transient
requirements into account. For assistance in calculating these factors, contact MTS Systems Corporation.
• MTS recommends that you install a shut-off valve and lock-out tag on each HSM to ensure that HPU
pressure is not applied to an HSM being serviced.
• To prevent movement of equipment due to hydraulic line transients, the recommended mounting method
includes anchor bolts set in concrete to a steel framework.
• If you have a multi-channel HSM configuration, MTS recommends that you install a shut-off valve and
lock-out tag on each HSM to ensure that HPU pressure is not applied to an HSM being serviced.
Model 293.32 HSM Hydraulic Connections
Hydraulic connections are made to the hydraulic power unit and the station components.
36 | Model 293.32 Hydraulic Service Manifold
Installation