Brake Release Manifold - Toro Groundsmaster 5900 Series Service Manual

Brake Release Manifold

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1. Brake release manifold
2. Flat washer (2)
3. Cap screw (2)
4. Hydraulic tube − from manifold
Brake Release Manifold Removal
Hydraulic System: Service and Repairs
5. Washer (4)
6. Grommet (2)
7. Spacer (2)
8. Bulkhead nut (2)
Both front wheel motors include a multi−disc parking brake that engages when
hydraulic pressure is not present (e.g. engine is running and parking brake
switch is set to ON or engine is not running). The brake release manifold includes
a manual release valve (MV), a hand pump (HP) and a relief valve (RV). When
the engine is running the manual release valve (MV) opens, pressurizing the
brake circuit and releasing the brakes. When the engine is not running, closing
the manual release valve (MV) and pumping the hand pump (HP) pressurizes
the brake circuit and releases the brakes for service. The relief valve (RV) keeps
brake circuit pressure below 27.6 bar (400 psi) when using the hand pump.
(Figure
1. Read the General Precautions for Removing and Installing Hydraulic System
Components (page
2. To prevent contamination of hydraulic system during manifold removal,
thoroughly clean exterior of manifold and fittings.
3. Disconnect all hydraulic lines from manifold and put caps or plugs on
open hydraulic lines and fittings to prevent system contamination. Label
disconnected hydraulic lines for proper assembly.
4. Remove hydraulic manifold from the frame.
5. If hydraulic fittings are to be removed from manifold, mark fitting orientation to
allow correct assembly. Remove fittings from manifold and discard O−rings.
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Figure 101
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101)
5–73).
Page 5–114
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9. Hydraulic tube − to brake
Flange nut (2)
Groundsmaster
16227SL Rev B
® 5900 & 5910