freightliner WALK-IN VAN CHASSIS Operator's Manual page 136

Hydraulic Hybrid
Procedure Performed
(check off)
Inspect _______ hydraulic system for fluid leaks
Inspect _______ hydraulic system hose(s) and fitting(s)
Check _______ LPR fluid level and pressure
Check _______ active warning indicators
Check _______ system faults on the message display screen
Inspector___________________________________________________ Date ________________
Table 16.1, Hydraulic Hybrid Daily Pretrip Inspection and Maintenance Checklist
NOTE: To help ensure that the hydraulic hybrid
vehicle delivers safe and reliable service, regu-
larly scheduled maintenance must be performed
by a certified hydraulic hybrid service technician.
Failure to follow a regular maintenance program
will result in inefficient operation, unscheduled
down-time, and will void the warranty.
Refer to the Walk-In Van Chassis Maintenance
Manual for more information concerning mainte-
nance intervals and the operations to be per-
formed.
Daily Pretrip Inspection and
Maintenance Procedures
DANGER
Warning labels are placed on various compo-
nents of the hydraulic hybrid drive system. Fail-
ure to read and follow the directions given can
lead to personal injury, loss of life, and vehicle or
component damage.
Never run hands, arms, or any other part of the
body over a hydraulic hose, line, fitting, or as-
sembly to check for leaks. A pinhole leak can re-
lease toxic fluid at more than 600 ft (183 m) per
second, acting as a hypodermic needle and pen-
etrating both protective clothing and skin at short
distances.
Never tighten or loosen a hydraulic connection
when the system is under pressure. The connec-
tion could fail catastrophically, causing personal
injury and/or damage to the vehicle. Make certain
that all high pressure is bled from the hydraulic
system before working on any connections.
16.13
Daily Pretrip Inspections/Checks
Use extreme caution when working with hydrau-
lic hoses, lines, fittings, or assemblies during in-
stallation, preventive maintenance, or component
replacement. Fluids under high pressure can be
dangerous and potentially lethal. Make sure to
bleed all high pressure so that hoses and compo-
nents can be examined safely.
Discharging high pressure using the manual
bleed valve does not release the nitrogen gas
precharge pressure within the accumulator. The
nitrogen is under high pressure and can be dan-
gerous and potentially lethal if the accumulator is
punctured.
It takes approximately 10 minutes for high-
pressure fluid to discharge once the manual
bleed valve has been opened. Do not attempt to
work on the hybrid drive system until there is
verification that the high-pressure fluid has been
fully discharged.
Do not exit the vehicle before applying the park
brake and shifting the transmission to neutral
(N). Otherwise, the vehicle could roll, causing
property damage, personal injury, or loss of life.
Failure or improper selection or use of hoses,
tubing, fittings, assemblies, or related accesso-
ries can cause death, personal injury, and prop-
erty damage. Possible consequences of failure or
improper selection or use of these items include
but are not limited to the following:
•
Fittings thrown off at high speed.
•
High velocity fluid discharge.
•
Explosion or burning of the discharged fluid.
•
Contact with suddenly moving or falling objects
that are controlled by the discharged fluid.
•
Injection by high-pressure fluid discharge.
Procedure
Reference
D1
D2
D3
D4
D5