Technical Information OSPM Mini-Steering Unit

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Contents: Chapter 1 _______________________________________________________________________ 4 Steering unit OSPM ____________________________________________________________________ 4 Application ___________________________________________________________________________________ 5 Advantages __________________________________________________________________________________ 5 Function _____________________________________________________________________________________ 5 Versions _____________________________________________________________________________________ 6 Code numbers ________________________________________________________________________________...

• Code numbers • Variants and ordering specifications • Technical data

• Compact-utility tractors • Turfcare machines • Universal tractors • Forklift trucks • Municipal vehicles • Small dimensions and low weight • End ports with integrated fittings • Easy installation and accessibility • Possibility of integrated steering column OSPM is a hydrostatic steering unit which can be used with an add-on steering column, or with a steering column integrated unit. (type A or B). The steering unit consists of a rotary valve and a rotary meter. When the steering wheel is turned, oil is directed from the steering system pump via the rotary valve and rotary meter to the cylinder...

Versions The mini-steering unit is available with the following valves: relief valve, shock and suction valves, check valve in P (in OSPM rear port versions only) and/or check valve in LS (standard in all LS versions). All OSPM's have check valve for emergency steering. alternatively in a version prepared for a (O-ring face seal). See Port Connections. The OSPM is also available with an integrated steering column or flange-on steering column. The connections are integrated endport fittings of the ORFS-type Standard port size is 9/16”-18 UNF OSPM steering unit is available in the following versions:...

OSPM ON Open center steering units have open connection between pump and tank in the neutral position. OSPM PB While in the neutral position, Power Beyond steering units route oil from the pump through to the E-port. The steering function always has priority, with any excess oil flow passing through the E port. If the steering wheel is held at full lock, all flow is led to tank across the pressure relief valve, and flow from the E port will stop.

OSPM LS In load sensing steering systems both the steering system and the working hydraulics can be supplied with oil from the same pump. The load sensing steering unit works in line with a priority valve and can be connected in parallel with working hydraulics. The priority valve ensures that the steering unit always has priority of the oil supply from the pump before any working hydraulics. Steering input is signaled back to the priority valve and/or a load sense pump through an extra port on the steering unit. The load sense signal controls the oil flow from the priority valve (and/or LS pump)....

OSPM Open-center Non-reaction steering units Table 2: OSPM Open center Non-reaction (OSPM ON) code numbers Steering Unit OSPM Relief valve Shock valves . . _ Steering wheel connection port__ OSPM 32 ON OSPM 32 ON OSPM 50 ON OSPM 50 ON OSPM 50 ON OSPM 80 ON OSPM 80 ON OSPM 80 ON None None Flanged-on Flanged-on Integrated type A Integrated type A Integrated type B Flanged-on Flanged-on Integrated type B OSPM Power Beyond steering units Table 3: OSPM Power Beyond (OSPM PB) code numbers Steering UnitOSPM Relief valve Shock valves Check Steering wheel connection port__ OSPM 80 PB 150L0139 None None...

Variants and ordering specifications OSPM, OSPMS, OSPMC and OSPMSC MMC Determine Master Model Code (MMC). Fill in the codes to specify OSPM steering unit. MMCpos. Your OSPM Example Circuit Type PTL&R Size PTL&R Interface Column Thread Relief Valve Shock Valves Suction Valves Check Valves Neutral Springs Your OSPM Example Your OSPM Example OSPM 80 LS example: based on code 11059680 Variants codes for OSPM, OSPMS, OSPMC, and OSPMSC MMC MMC pos. 1 Main steering product Type OSPM Steering units, rear-ported, male shaft: For column OSPM Steering units, rear-ported, male shaft: For steering wheel A...

ON## Open center Non-reaction PB## Power Beyond Non-reaction LS## Load Sensing Non-reaction CN## Closed Center for X-types RRRR 9/16"-18 UNF (ORFS, ISO 8434-3) (OSPM/OSPMC) SSSS 11/16"-16 UNF (ORFS, ISO 8434-3) (OSPM/OSPMC) SSRR P&T: 11/16"-16 UNF , L&R: 9/16"-18 UNF (ORFS, ISO 8434-3) (OSPM/OSPMC) O-ring boss + Spot-face (ISO 6149-1) (OSPMS/OSPMSC) O-ring boss + Spot-face (ISO 11926-1) (OSPMS/OSPMSC) Column Thread M6, M8 ears (ears on end cover) (OSPM) M6 (OSPM/OSPMS and OSPMC/OSPMSC w. round flange for column) M10x1,5 (OSPMC and OSPMSC w. square flange for column) LS/E: 9/16"-18 UNF (ORFS,...

SM1 OSPM/OSPMS ON. For pump flow range 4-12 l/min. Type Column SM2 OSPM/OSPMS ON. For pump flow range 5-20 l/min. Type Column SM3 OSPM/OSPMS ON. For pump flow range 5-20 l/min. Type A SM4 OSPM/OSPMS ON. For pump flow range 4-12 l/min. Type B SM5 OSPM/OSPMS ON. For pump flow range 5-20 l/min. Type B SM6 OSPM/OSPMS PB. For pump flow range 5-20 l/min. Type Column SM7 OSPM/OSPMS PB. For pump flow range 5-20 l/min. Type A SM8 OSPM/OSPMS PB. For pump flow range 5-20 l/min. Type B SN1 OSPM/OSPMS LS. Dynamic flow range 0.6-0.9 l/min. Type Column SN2 OSPM/OSPMS LS. Dynamic flow range 0.6-0.9 l/min. Type...

Technical data Displacement, flow and pressure OSPM/OSPMS/OSPMC/OSPMSC ON/PB Steering unit System pressure PT port pressure System pressure LS-T port pressure OSPM 32 ON OSPM 40 ON OSPM 50 ON OSPM 63 ON OSPM 70 ON OSPM 80 ON OSPM 100 ON OSPM 32 PB OSPM 40 PB OSPM 50 PB OSPM 63 PB OSPM 70 PB OSPM 80 PB OSPM 100 PB Criteria for determining the recommended oil flow: • The minimum is the oil flow it takes to ensure sufficient steering speed at idle motor speed • Must ensure the least possible pressure loss at full speed The steering unit can cope with an oil flow that is up to 50% higher than the...