Walker D21d Operator's Manual page 14

Component Identification
Oil Fill Water Temperature
Starter Motor Below
Exhaust
Cap Gauge Sender
(Not Visible)
Manifold
Alternator
Thermostat Housing
and Thermostat
Glow Plug(s)
Fuel Pickup
Water Pump
Line
Fan Motor
Fuel Return
Line
Fuel
Gauge
Radiator Screen
(Removable)
Fuel Tank
Radiator Fan
Cap
and Shield
Throttle Control
Engine Stop Lever Linkage
Injection
Air Intake
Linkage Lever
Injectors
Pump (Fuel Shut-Off Valve)
Hose
Top View (Engine Compartment)
10