ROBERT BOSCH MODEL MW INJECTION PUMP
GENERAL PUMP INFO
Engines with serial numbers below 400 000 use the
UTDS* Model 100 pump, with the exception of DT-466B,
TD 15C Paydozers and DT-466B, 175C Payloader which
use the Robert Bosch MW Pump.
Engines with serial numbers above 400 000 (all DT-466
"C" series) use the Robert Bosch Model MW Pump.
OPERATION ROBERT BOSCH MODEL MW PUMP
The Robert Bosch Model MW injection pump is a
multiple plunger design with one plunger, barrel and
delivery valve for each engine cylinder. A variable speed
governor allows engine speeds to be controlled within
specified limits for power takeoff applications.
preference, the pump is equipped with an electrical or
mechanical fuel shutoff. Each pump has a hand priming
pump to fill filters after replacement of fuel. Exhaust
smoke levels during engine acceleration are controlled
by an aneroid assembly.
The pump consists of the following major components
which will be reviewed, first briefly then in more detail to
assist the reader in understanding construction features
and pump operation: (Figure 2)
MW Injection Pump
Supply Pump with Hand Priming Pump
Fuel Return Valve
Figure 2. - Pump Features
*United Technologies Diesel Systems
PRINTED IN UNITED STATES OF AMERICA