Kubota RT120Q, Operator'S Manual, Page: 157 / 219

Service - 156
RT120Q Operator’s Manual
Recommended Lubricants/Service Key
Proper lubrication and maintenance protects Ditch Witch
®
equipment from damage and failure. Service
intervals listed are for minimum requirements. In extreme conditions, service machine more frequently.
Use only recommended lubricants. Fill to capacities listed in “Fluid Capacities” on page 196.
For more information on engine lubrication and maintenance, see your Deutz engine manual.
Tier 4i Engine
The Deutz Tier 4i TCD 3.6 L4 engine uses a computer-controlled fuel management system, turbocharger
with charge air cooling, and exhaust after treatment system (EAT). The engine and the corresponding EAT
system are adapted to each other and linked by an appropriate electronic controller.
The diesel oxidation catalytic converter behind the cylinder head at the rear of the engine is a very
recognizable feature. A crankcase breather is located on top of the left side of engine.
Diagnostic and maintenance work may only be carried out by authorized personnel using equipment
approved by Deutz.
Deutz control units are equipped with self-diagnostics. Active and passive error codes are saved in the
error memory. Active errors are displayed on the electronic display panel or error lamp (flash code) CAN
bus. If error codes are recorded, call Product Support.
NOTICE:
• Use only genuine Ditch Witch parts, filters, approved lubricants, TJC, and approved coolants to
maintain warranty.
• Use the “Service Record” on page 217 to record all required service to your machine.
NOTICE: Diesel engines that are equipped with an exhaust after treatment system (EAT) may only be
operated with an ultra low sulfur diesel fuel. See “Tier 4i Engine” on page 156.