Johnston VT501 - Sweeping System; Powaboom; Rear Wanderhose Option Pressure; Hopper Lower Pressure

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MA2:3
V Range 501 l 651 l 801 Maintenance Manual
Johnston Sweepers Limited
Chapter - Hydraulic System
Page Issue B
Hopper Lower Pressure:
Select option 2 from menu 4.12 and follow the on screen prompts:
Connect a suitable 250 bar gauge to test point H-8Z2 on the discharge system block on the LH side
of the machine in front of the rear wheels. Once connected, acknowledge this by pressing the rotary
encoder on the display.
Start the engine and run at the appropriate speed and acknowledge by pressing the rotary encoder on
the display.
Check pressure and adjust if required relief valve H-9V2 on the discharge system block to 110 bar.
Acknowledge the pressure is set by pressing the rotary encoder on the display.
Do not run the pressure test for more than 30 seconds.
Sweeping System
Supawash / Front Brush Option Pressure:
First remove the hose from port MA on the Supawash block located on the LHS of the Subframe in front
of the centre cross-member. Plug port MA and plug the end of the hose.
Select option 3 from menu 4.12 and follow the on screen prompts:
Connect a suitable 250 bar gauge to test point H-12Z2 on the Supawash block. Once connected,
acknowledge this by pressing the rotary encoder on the display.
Start the engine and run at the appropriate speed and acknowledge by pressing the rotary encoder on
the display.
Check pressure and adjust if required relief valve H-12V2 on the Supawash block to 220bar.
Acknowledge the pressure is set by pressing the rotary encoder on the display.
Reconnect the hydraulic hose.
Do not run the pressure test for more than 30 seconds.
Powaboom / Rear Wanderhose Option Pressure
Select option 4 from menu 4.12 and follow the on screen prompts:
Connect a suitable 250 bar gauge to test point H-14Z2 on the Powaboom block located on the RHS of
the Subframe rear cross-member. Once connected, acknowledge this by pressing the rotary encoder
on the display.
Start the engine and run at the appropriate speed and acknowledge by pressing the rotary encoder on
the display.
Check Hydraulic Pressure Powaboom
Check and adjust if required relief valve H-14V2 (See Hydraulic Circuit Sheet 10 C-3)
Acknowledge the pressure is set by pressing the rotary encoder on the display.
Reconnect the hydraulic hose.
Do not run the pressure test for more than 30 seconds.