Taylor TX180S, Maintenance Manual

Page: 250 / 320

TX / TXH / TXB 180S - 400L (Rev. 4/23/07) TX / TXH / TXB 180S - 400L (Rev. 4/23/07) 20H-4 20H-4
Section 22 Section 22
Hydraulic System Hydraulic System
Steering Logic Steering Logic (Illustration 22-20 and 22-14) (Illustration 22-20 and 22-14) . .
Hydraulic flow from the larger of the two gear sets Hydraulic flow from the larger of the two gear sets
in the main pump enters the manifold at port P1. in the main pump enters the manifold at port P1.
Flow is then directed to the main relief valve (RV1) Flow is then directed to the main relief valve (RV1)
and the two steering logic controls (LC2 and LC3). and the two steering logic controls (LC2 and LC3).
If there is no demand from steering, LC2 sends If there is no demand from steering, LC2 sends
flow to the orbitrol until 150 psi (10.4 bar) standby flow to the orbitrol until 150 psi (10.4 bar) standby
pressure can maintained in the line causing LC2 pressure can maintained in the line causing LC2
to close. to close. The flow opens The flow opens LC3 and is LC3 and is then directed then directed
to the hoist to the hoist and tilt valv and tilt valv es. es. When steering, load When steering, load
sense pressure builds from the orbitrol, which sense pressure builds from the orbitrol, which
tank return from one outlet port to force fluid tank return from one outlet port to force fluid
through a hydraulic cooler located behind the through a hydraulic cooler located behind the
radiator. radiator. The check acts The check acts as a bypass as a bypass valve for valve for
cold fluid startup as well as increased flow to tank cold fluid startup as well as increased flow to tank
as the mast is being lowered. as the mast is being lowered.
Brake / Brake Cooling Logic Brake / Brake Cooling Logic (Illustration 22-20) (Illustration 22-20) . .
The auxiliary pump is a two section pump with The auxiliary pump is a two section pump with
gear sets of gear sets of equal size. equal size. Flow from Flow from one gear set one gear set
enters the manif enters the manif old at port old at port P3. P3. Flow is Flow is blocked by blocked by
logic element (LC1) and must pass through orifice logic element (LC1) and must pass through orifice
https://www.forkliftpdfmanuals.com/