PREVOST H3-41 Maintenance Manual page 695

3 VEHICLE JACKING POINTS
For detailed instructions, refer to Maintenance
information MI18-18, available on the technical
publications USB flash drive and website.
3.1 HYDRAULIC JACK
To raise: turn release valve clockwise. Insert
handle in socket and raise vehicle by pumping.
To lower: remove handle and turn the release
valve slowly counterclockwise.
Always keep ram and extension screw retracted
when jack is not in use.
Service: Check oil level when jack fails to raise
to full height. Lower ram completely with release
valve open and jack in upright position, remove
filler plug and refill to level of filler hole with
hydraulic jack oil. Never use brake fluid.
DANGER
Jack is intended for lifting only. Do not get
under the vehicle or load for any reason unless
it is properly supported with safety stands and
securely blocked.
DANGER
Do not overload jack above rated capacity.
Prevent "side loading", make sure load is
centered on ram. Do not push or tilt load off
jack.
4 TOWING THE VEHICLE
For detailed instructions, refer to Maintenance
information MI18-18, available on the technical
publications USB flash drive and website.
5 VEHICLE STRUCTURE
The body of the X Series vehicles is an integral
structure made of 14, 16 and 18 gauge welded
and braced high tensile steel and stainless steel
members. All stainless exterior panels are glued
to anti-corrosion coated members. The complete
structure is protected against corrosion prior to
assembly. The front and rear caps are made of
molded fiberglass. The main roof is made of high
tensile aluminum panels riveted to the roof
structure. The floor is made of 2 layers of ½" (13
mm) thick plywood separated by a 1/8" (3 mm)
insulation to reduce power train and road noises.
Welding
Since welding is a procedure that may be carried
out either as specific instructions from Prevost or
by an independent decision of the owner, the
following information
should be read before beginning any welding
procedure. The prohibitions and requirements
outlined below must be followed during welding
procedure:
1. Welding must be done only by a qualified
and experienced person.
2. Adequate ground contacts and shields must
be positioned
components from damage due to heat,
contact by weld splatter, arcing, or other
potentially damaging events associated with
welding.
3. The following precautions are to be taken to
protect the electronic control components.
Refer
"PRECAUTIONS
BEFORE WELDING" in this manual.
4. Always
equipment.
5. Weld in clean and well-ventilated area, and
always have an appropriate fire extinguisher
within your reach.
6 VEHICLE EXTERIOR MAINTENANCE
Regular washing to remove dust and dirt is
recommended. See "Owner's Manual" for more
details on washing and cleaning your vehicle.
6.1 CORROSION PREVENTION
Preventive maintenance is a key factor in
avoiding corrosion and must be considered as
part of the regular service intervals. The entire
underside of the vehicle is sprayed with a heavy
application of asphalt base undercoating.
The operating environment the vehicle is
subjected to will largely influence the amount of
dirt and corrosion that will accumulate over a
given period. Corrosion is one of the most costly
factors of part failure and shortened part life. It
PA1621 Maintenance Manual All Series | Revised Sept 2019
SECTION 18b: X3 SERIES BODY
pertaining
as required
to section 00, paragraph
TO BE
wear the appropriate
to welding
to protect
3:
OBSERVED
safety
11