NDD Tech Support

NDD Tech Support2021-10-25T03:28:20+00:00

TRUCK MOUNTED
HYDRO EXCAVATOR SYSTEM
Model NDD8000

System will not engage2021-10-25T02:22:23+00:00

Park brake not activated – Engage

Air pressure too low – Allow to build up

Truck not in neutral – Select Neutral

Leaking air hose or fitting – Repair/Replace

Electrical fault – Check (Refer Section 12 of Manual)

Truck not in gear – Select correct gear

Ancillary mode drive gear not selected – Engage

Incorrect procedure for engagement – Refer Section 5 of Manual

Emergency stop button engaged Reset

Vacuum Pump will not run2021-10-25T02:23:32+00:00

System not engaged – Engage

Remote not connected – Connect correctly

Remote damaged – Repair/Replace

Emergency Stop activated on pendent or control panel – Reset

Debris tank full  -Empty

Drive belt loose or broken – Adjust/Replace

Electrical fault – Check (Refer Section 12 of Manual)

Remote control System “ON” not activated – Activate

Flat battery – Charge

Module plug not connected – Connect

Controller damaged – Repair

Vacuum Pump Drive Noisy2021-10-25T02:25:42+00:00

Drive Belt loose (banging noise) – Adjust belt tension, Adjust vacuum pump clutch

Water pump will not run2021-10-25T02:33:23+00:00

System not engaged – Engage

Remote not connected – Connect correctly

Remote damaged – Repair/Replace

Emergency Stop activated on control panel – Reset

Water level too low – Fill

Damaged input drive shaft – Repair/Replace

Electrical fault Check (Refer Section 12 of Manual)

Remote control System “ON” not activated – Activate

Flat battery – Charge

Module plug not connected – Connect

Controller damaged – Repair

Faulty Low Water switch (NB 2 Used on Tipping body version) – Replace

Low vacuum performance2021-10-25T02:37:16+00:00

Incorrect drive gear selected (Manual Only) – Select correct gear

Vacuum filter blocked – Clean

Dewater valve not closed – Close

Tank drain valve not closed (Option) – Close

Blocked boom hose or ‘T’ piece – Clear

Damaged or missing sight gauge – Repair/Replace

Vacuum relief valve/s jammed – Free

Boom hose worn – Replace

Tank internal filter restricted – Clean

Loose drive belt – Adjust

Damaged door seal – Replace

Cover loose on plenum box – Tighten

Worn lobes on vacuum pump – Repair

Inspection cover on T-Piece not fitted – Fit

Low water pressure/pulsation2021-10-25T02:41:44+00:00

Incorrect drive gear selected (manual Only) – Select correct gear

RPM selection switch set too low – Reset

Water pressure selection set to low – Switch to High

Dirty water filter – Clean

Incorrect or worn jetting nozzle – Replace

Filter isolation valve not fully open – Open

Water drain valve not properly closed – Close

Damaged sewer hose or fitting – Repair/Replace

Leaking rotary union/s  – Repair/Replace

Regulator has worn valve/seat – Repair/Replace

Pump valves or packings worn – Repair/Replace

Regulator air pressure too low – Adjust

Water leak in water supply – Replace

Tank flush diversion valve worn – Replace

Hydraulic low power2021-10-25T02:44:43+00:00

Hydraulic oil low level – Fill

Blocked return filters – Replace

Ruptured line or fitting – Repair/Replace

Hydro Excavation Water Pump (Optional) Will not run2021-10-25T02:49:45+00:00

System not engaged – Engage

Emergency Stop activated at rear of unit Remote or control panel – Reset

Water level too low – Fill

Electrical fault Check (Refer Section 12 of Manual)

Remote control System “ON” not activated – Activate

Flat battery – Charge

Module plug not connected – Connect

Faulty Low Water switch (NB 2 Used on Tipping body version) – Replace

Hydro Excavation Low water pressure/pulsation2021-10-25T02:52:41+00:00

Incorrect drive gear selected (Manual Only) – Select correct gear
Dirty water filter – Clean
Incorrect or worn jetting nozzle – Replace
Suction Isolation Valve – Off
Filter isolation valve not fully open – Open
Leaking rotary union/s – Repair/Replace
Regulator has worn valve/seat – Repair/Replace
Pump valves or packings worn – Repair/Replace
Faulty low water switch – Replace
Water leak in water supply – Replace
Diversion valve set to tank flush – Change
Hydro Excavation Pump pulsing on and off – Leak in system, hose, rotary union, gun

Go to Top