7 System Descriptions (cont.) FAN DRIVE SYSTEMS: On / Off Circuit 4 - Relief valve to limit the maximum motor speed and prevent the motor from over-pressurization and a solenoid valve to bypass flow around the motor. * Length adder to Hydraulic Motor Catalog max. length dimension, mm [inch]. E.G. WM900 L above = 92 mm. WM900 max. length in Motor Catalog - pg 16 (X dim.) = 111 mm [4.37 in.] for 19 cc. Therefore, 92 mm + 111 mm = 203 mm [7.99 in.] max. length. WM600 WM900 WM1500 FM20 FM30 FAMILY WM600 WM900 WM1500 GM20 GM30 L* 37 [1.45] 92 [3.62] 40 [1.57] 32 [1.25] 35 [1.37] W 138 [5.43] 90 [3.54] 177 [6.96] 148 [5.82] 171 [6.73] H 137 [5.39] 130 [5.11] 144 [5.66] 230 [9.05] 239 [9.4] NOTE: Valve coils not shown for clarity. PERFORMANCE (Circuit 4) * Length adder to Hydraulic Motor Catalog max. length dimension, mm [inch]. E.G. WM900 L above = 48 mm. WM900 max. length in Motor Catalog - pg 16 (X dim.) = 111 mm [4.37 in.] for 19 cc. Therefore, 48 mm + 111 mm = 159 mm [6.25 in.] max. length. WM600 WM900 WM1500 FAMILY WM600 WM900 WM1500 L* 29 [1.14] 48 [1.88] 33 [1.29] W 144 [5.66] 146 [5.74] 155 [6.1] H 137 [5.39] 137 [5.39] 167 [6.57] Circuit 10 - Check valve to prevent cavitation during deceleration and spin-down, a thermal pilot-operated wax capsule to activate the relief valve at a specific temperature, a relief valve to limit the maximum fan speed and protect the motor from over-pressurization and a needle valve for field adjusting the relief valve (if required) and the minimum motor speed. Note: This system only monitors the fluid running through it (no external signal available). PERFORMANCE (Circuit 10) quality products for mechanical & fluid power jbj Techniques Limited, www.jbj.co.uk quality products for mechanical & fluid power ~ jbj Techniques Limited, www.jbj.co.uk UK distributor for Concentric Hydraulics
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