Komatsu PC400-7 & PC450-7 Excavator Service Repair Manual

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Komatsu PC400-7 & PC450-7 Excavator Service Repair Manual

High production and low fuel consumption are
achieved through the following two operation
modes:
Active mode, with maximum engine output to handle large
production, while keeping fuel consumption low; and Eco
mode for light duty applications, which enables operation
at a speed comparable to Active mode with even lower fuel
consumption. The two modes, Active mode for handling
“large production” and Eco mode for “low fuel consumption”
have been significantly improved.

ACTIVE MODE
This mode handles large production by providing powerful
and speedy operation, and achieves economical efficiency by
substantial reduction of fuel consumption. Komatsu PC400-7 & PC450-7 Excavator Service Repair Manual
ECONOMY MODE
Operation speed equal to that of the Active mode can be
achieved when handling light duty operation while also
keeping fuel consumption low.
Electronically Controlled High Power Engine Installed
A 246kW (330HP) Komatsu SAA6D125E engine, is the
largest in its class.
High power and low fuel consumption are achieved by
optimizing fuel injection via electronic control.
Maximum Digging Force among the 40-ton Class
With the addition of a one-touch power max. function
(operation time of 8.5 seconds), the digging force has been
further increased.
Maximum arm crowd force (ISO):
198 kN (20.2t) 214 kN (21.8t)
Maximum bucket digging force (ISO):
252 kN (25.7t) 275 kN (28.0t)

Komatsu PC400-7 & PC450-7 Excavator Service Repair Manual

Comfortable Cab
New PC400-7’s cab volume is increased by 14%, offering an
exceptionally comfortable operating environment. The large
cab enables full flat reclining of the seat back with headrest.
Pressurized Cab
The optional air conditioner, air filter and a higher internal air
pressure (6.0 mm Aq 0.2″ in Aq) prevent external dust
from entering the cab.
Low Noise Design
Noise level is remarkably reduced, not only engine noise but
also swing and hydraulic relief noise.
Low Vibration with Cab Damper Mounting
PC400-7 uses a new, improved cab damper mount system
that incorporates longer stroke and the addition of a spring.
The new cab damper mounting combined with a
strengthened left and right side deck aids vibration reduction
at the operator’s seat.
Vibration at floor is reduced from 120 dB (VL) to 115 dB (VL).