Ditch Witch JT100AT - Manual (Page 223)

Service - 222
JT100/JT100 All Terrain Operator’s Manual
As Needed
CMW
©
Vent Fuel System
Vent air from fuel system as needed. Unit will not
start if it has run out of fuel until air has been
vented from fuel system.
To vent
1. Fill fuel tank with diesel fuel.
2. Set engine controller to stop position.
3. Place container under filter housing to catch
any spilled fuel.
4. Open vent screw (2).
5. Press and turn bayonet plug
counterclockwise to primer pump (1). The pump is now pushed out through the spring.
6. Pump primer pump (1) until fuel escapes from vent screw without air bubbles.
7. Tighten vent screw to 11 ft•lb (15 N•m).
8. Continue pumping primer pump (1) until a strong resistance is felt. Lock the bayonet plug of the primer
pump by pressing and turning clockwise at the same time.
9. Set engine controller to start position and crank engine.
10. Check for leaks after engine has started.
Check JT Fluid Pump Rotation Speed
Check rotation speed at speed sensor (shown)
when pump flow increases dramatically or after
rebuild. Check maximum pump flow by capping
saver sub to deadhead drilling fluid flow and
measuring pressure. Reading should be no more
than 6450 ± 50 psi (445 ± 3 bar). Adjust pressure
at hydraulic pump as needed. Replace packing
when pressure can no longer be adjusted into
range. See your Ditch Witch
®
dealer for
replacement packing.