Grech Motors G28 User manual

MOTORS
This label contains vital information used to identify your specic vehicle and the safety features
that must be understood and followed in order to operate this vehicle safely.
Your Grech Vehicle ID Number is:

MOTORS
Congratulations,
and thank you for purchasing a Grech Motors Vehicle.
You have taken ownership of a true luxury vehicle which is in a class all its own. We are
providing this manual to familiarize you with your new Grech Motors vehicle. This manual
shall serve as a reference document for the operations and maintenance procedures that
shall be required throughout the life of your vehicle. This edition covers all Chassis models,
and is designed to be used in conjunction with the original chassis manufacturer’s owner’s
literature, as well as all other component manufacturers literature.
IMPORTANT: PLEASE READ CAREFULLY
For your safety and the safety of others, we ask that you completely familiarize yourself with
this manual, and all other operators manuals before you operate this vehicle for the first time.
PLEASE NOTE: Updates to all manuals are online at GRECHMOTORS.COM
Grech Motors 6915 Arlington Avenue Riverside, California 92504
(855)-994-7324 GRECHMOTORS.COM

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TABLE OF CONTENTS
SAFETY
Pre-Trip Inspection (suggested minimum) 6
General Vehicle Safety Warnings 8
Vapor Door Operational Safety Check List 10
Electric Door Emergency Release Lever 12
Emergency Egress Window Operation 14
Emergency Roof Hatch Exit 16
Dual Overhead Parcel Rack 18
OPERATION
Drivers Overhead Control Panel for F-550 & Freightliner 19
Drivers Dash Control Panel for E-450 20
PROAIR Control Panel 21
Audio/Video PA Control 22
Diesel Exhaust Fluid & Engine Brake 24
Water Fill Tank & Water for Lavatory 25
Lavatory Operations (if equipped) 26
Factory Suspension Dump System Operation 27
Auxiliary Battery Location 28
E-450 Heated Mirror Operation 29
Rear Step Operation 30

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TABLE OF CONTENTS
31
32
33
34
37
58
63
64
65
66
70
73
75
77
79
80
84
CAUTION-ADVISORY Regarding Customer Vehicle Alterations
General Vehicle Dimensional Specications
Vehicle ID Labels
Customer Assistance
Wheels and Tires
Load Carrying Capacities
Ultra Ride Air Suspension
Firestone Ride Rite Air Spring
Kelderman Suspension
Preventative Maintenance
Basic Troubleshooting
E450 Vehicle Circuit Board Assembly
F550 Vehicle Circuit Board Assembly
Freightliner Vehicle Circuit Board Assembly
Vehicle Wiring Diagrams Online @ WWW.GRECHMOTORS.COM
Parts - Service - Warranty
Vendor Reference Listing
GRECH MOTORS Warranty Statement 85

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Pre-Trip Inspection (suggested minimum)
1 Check preventative maintenance schedule for services due at present mileage
2Calculate Load Carrying/Payload Capacity (See page 56 of this manual)
3Check Side Passenger Entry Door - Emergency Exit Operation & Obstruction Sensing System
4 Check operation of drivers seat and seat belt
5 Check operation of steering wheel and shift levers
6 Check operation of turn indicators
7 Check operation of foot pedals and parking brake
8 Check operation of all gauges, for normal readings with engine running
9 Check operation of dash indicator lights with key on, engine not started, then again with
engine started
10 Check operation of ventilation system: heating, defrosters, fans and air conditioning
11 Check: horn, wipers, washers, and mirrors for cleanliness, adjustment, operation and
damage
12 Check condition of re extinguisher, warning reectors and rst aid kit
13 Check all doors, glass and windows for operation, cleanliness, and damage.
14 Check all emergency exits for operation, warning devices, markings, to be free and clear
15 Check interior lighting: for operation and damage
Any item not passing inspection, must be reported immediately, before operating vehicle
FAILURE OF HIGHLIGHTED ITEM(S) TO PASS INSPECTION WILL CAUSE VEHICLE TO BE GROUNDED
Item Inspection Procedure Pass Fail

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16 Check Side Passenger Entry Door for damage and proper closing operation
17 Check exterior lighting for operation and damage
18 Check exterior for cleanliness, markings and damage
19 Check fuel cap in place and secure
20 Check all tires and wheels for tread depth, cracks & bulges, missing lug nuts, and air
pressure Frt 75 psi & Rr 80 psi for E-450, 95 psi for F-550, 110 psi for Freightliner
21 Check oil level
22 Check transmission uid level
23 Check engine coolant level
24 Check power steering uid level
25 Check brake uid level
26 Check belts for tension and wear
27 Check operation of cameras, if applicable
28 Check operation of PA system, if applicable
29 Check operation of audio and video system, if applicable
30 Check wheelchair lift for proper function or damage and securement station equipment
Any item not passing inspection, must be reported immediately, before operating vehicle
FAILURE OF HIGHLIGHTED ITEM(S) TO PASS INSPECTION WILL CAUSE VEHICLE TO BE GROUNDED
Pre-Trip Inspection (suggested minimum)
Item Inspection Procedure Pass Fail

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NO STANDEES ARE ALLOWED,AT ANY TIME, WHILE THE VEHICLE IS IN MOTION.
DISCONTINUE OPERATION OF THE VEHICLE,IF ANY CRITICAL ITEM ON THE PRE-TRIP INSPECTION LIST FAILS TO
PASS, OR UNTIL ALL PROBLEMS HAVE BEEN RESOLVED.
DISCONTINUE OPERATION OF THE VEHICLE, IF THE DOOR WARNING BUZZER/DOOR AJAR LIGHT IS ILLUMINATED
WHILE VEHICLE IS IN MOTION.
IF A DOOR AJAR WARNING LIGHT IS LIT, CHECK ALL DOORS FOR PROPER CLOSURE. NEVER OPERATE THIS
VEHICLE UNTIL THE PROBLEM HAS BEEN RESOLVED.
THIS BUS IS NOT DESIGNED TO TOW ANOTHER VEHICLE OR TRAILER.DO NOT ATTEMPT TO TOW OR PULL ANOTHER
VEHICLE WITH THIS BUS.
DISCONTINUE OPERATION OF THE VEHICLE,IF ANY PERSON STANDS IN THE BUS WHILE THE VEHICLE IS IN MOTION.
DISCONTINUE OPERATION OF THE VEHICLE, IF A DOOR OR EMERGENCY EXIT SHOULD OPEN WHILE THE VEHICLE
IS IN MOTION.
GENERAL VEHICLE SAFETY WARNINGS

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Vapor Electric Door Operational Safety Check List
The Obstruction Sensing System - (must be checked on a daily basis)
The electric actuated passenger door system is designed to detect an obstruction that may interfere with door’s
operation while closing. When the Obstruction Sensing System detects an obstruction while the door is closing, the
system will stop the door and then reopen it. After a brief delay, the System again will attempt to close the door. The
System will stop and reopen the door if it detects an obstruction again. If the System detects an obstruction on its
third attempt to close the door, it will stop with the door coming to rest in the open position. Pressing the door control
command button again (ref. pg 11 & 19) will allow the operator to resume the door closing process. If a problem
persists, call the Grech Motors Service Department at 1-855-994-7324
ATTENTION
Obstruction Sensing
This vehicle is equipped with an Electric Actuated Passenger Door
made by Vapor/Wabtec
Electric Door Operation Safety Check List
The vehicle user should conduct a daily check of each of the following systems when
operating a vehicle with an electric actuated passenger door.

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The vehicle driver should test the Obstruction Sensing System every day before putting the vehicle into
service. To test the System, the vehicle driver should:
1. Activate the Door Command Button to move the door into its fully opened position.
2. While keeping the passenger doorway clear of objects and passengers, the vehicle driver should
create an obstruction in the doorway by placing a piece of wood or other debris in the door’s
path.
3. Next, the vehicle driver should attempt to close the passenger door by activating the Door
Command Button.
4. If the passenger door contacts the obstruction and fails to stop once it makes contact, call the
Grech Motors Service Department at 1-855-994-7324 and do not operate the vehicle.
5. If the passenger door stops and re-opens without seeming to contact an obstruction, call the
Grech Motors Service Department at 1-855-994-7324 and do not operate the vehicle.
6. If the passenger door contacts an obstruction, stops, re-opens and closes, and if it continues
repeating this process without stopping in the open position after the third cycle, call the Grech
Motors Service Department at 1-855-994-7324 and do not operate the vehicle.
7. If the passenger door fails to close when the operator puts the vehicle into gear, call the Grech
Motors Service Department at 1-855-994-7324 and do not operate the vehicle.
The Obstruction Sensing System Test Procedure
Vapor Electric Door Operational Safety Check List

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The Emergency Release Lever
System - (must be checked on a daily
basis)
This vehicle is equipped with an Emergency
Release Lever that, when actuated, will allow
passengers to open the door. The Emergency
Release Lever System is actuated by moving
the RED HANDLE from right to left as indicated
on the sticker. See Photo No. 1 on page 13.
When the Emergency Release Lever is in
the left position, the door can be opened with
hand-pressure applied to push the door out
and away from the bus.
Electric Door
Auxiliary Door Switch door operation -
This vehicle is equipped with an Auxiliary Door
Switch. The Auxiliary Door Switch allows an
operator to open the passenger door when
outside the driver’s compartment. The Auxiliary
Door Switch is located on the pillar behind the
passenger seat in driver’s compartment.
Vapor Electric Door Operational Safety Check List
Side Entry Door in the
un-locked Position
Side Entry Door in the
locked Position

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Electric Door Emergency Release Lever
The vehicle driver should test the Emergency Release Lever (ERL) System every day before putting the vehicle into
service. To test the System, the vehicle driver should:
1. Actuate the Emergency Release Lever by moving the red handle from the right to the left.
See Photo No. 1 on page 13.
2. Open the door by pushing it out and away from the coach.
3. When released, the door should move freely and with minimal pressure away from the coach
and into the door’s fully open position.
4. After determining the door opens freely, return the door to its closed position and re-engage the
Emergency Release Lever by moving the red-handle from the left to the right. See Photo No. 2
on page 13.
5. Conrm that the red-handle moves from the right to the left, and from the left to the right, without
obstruction. If the red-handle does not move smoothly and without obstruction, call the Grech
Motors Service Department at 1-855-994-7324 and do not operate the vehicle.
6. Conrm that the Emergency Release Lever is in the right position, that it engaged and secured
the door against the coach. While the ERL is in the closed and locked position, because the red-
handle is in the right position, attempt to push against the door as if to open it. The door should
not move. If the door moves while the red-handle is in the right position, call the Grech Motors
Service Department at 1-855-994-7324 and do not operate the vehicle.
7. The vehicle should never be driven with the Emergency Release Lever in the left or forward
position.
Electric Door

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Emergency Exit Lever Decal
Electric Door Release Lever- Closed Position
EMERGENCY USE ONLY
CAUTION!
LEVER MUST BE CHECKED
DAILY, PRIOR TO VEHICLE
OPERATION
Electric Door Release Lever- Exit Position
Electric Door Emergency Release Lever
Photo 1
Photo 2

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Emergency Egress Window Operation
Windows with Emergency Exit stickers are designated
Emergency exits. Follow the directions on the sticker.
Rotate Handle and push window out.
CAUTION!
Check Exit Operation, Daily.
This vehicle is equipped with (multiple) Emergency Egress Windows. These windows serve as supplemental exit
points in the event of an emergency. The vehicle has (multiple) Emergency Egress Windows on the passenger side
and the driver’s side of the vehicle.
The Emergency Egress Windows are a vital component in the vehicle’s emergency exit system. As such the vehicle
driver should test the Emergency Egress Window Operation every day before putting the vehicle into service.
To test the System, the vehicle driver should check the following items:
Handle in Closed Position
Photo 1
Handle in Open Position
Photo 2

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Emergency Egress Window Operation
1. Each Emergency Egress Window is marked by an Emergency Exit sticker on the right side of the window,
half way up, next to the Emergency Handle. Conrm that each Emergency Egress Window is equipped
with the sticker designating that window as an emergency exit. If the Emergency Egress Window is
missing the Emergency Exit designation sticker, call the Grech Motors Service Department at
1-855-994-7324 and do not operate the vehicle.
2. Each Emergency Egress Window is secured by one latch, on the right side of the window, half way up.
Actuate the Emergency Egress Window by rotating the handle as shown in Photo No. 2 on page 14.
The latch is in the released position when the handle moves from the vertical to the horizontal position,
and releases the window to be pushed open.
3. When Emergency Egress Window Latch is released, the user can open the window by pushing on the
bottom of the window frame. The Emergency Egress Window should swing out and away from the
vehicle.
4. If the Emergency Egress Window does not swing open when the latches are released and the window
frame is pushed, call the Grech Motors Service Department at 1-855-994-7324 and do not operate the
vehicle.
5. When properly closing the Emergency Egress Window back to a secured position, the handles will return
to the vertical locked position. Each latch should be in the locking position when the user moves the latch
to the vertical position. Check to ensure the Emergency Egress Window is secured against the coach by
pushing against the window frame while the latch is in the locked vertical position.
Front Windshield Caution!
It is highly recommended that decals not be used on the front windshield. The use of decals
may cause discoloration over time, and thereby permanently discolor the area beneath the decal.

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Emergency Roof Hatch Exit
SEE MANUFACTURERS LITERATURE
FOR ADDITIONAL INFORMATION
SUGGESTED MAINTENANCE
Periodically inspect attaching fasteners for evidence of
loosening due to tampering, and regularly clean surface
with a mild soap and water.
CAUTION: When removing grafti, it is the customers
responsibility to ensure cleaning solutions are
compatible with the materials used on Safety Vents.
Solutions containing, acetone, ether, lacquer thinner, or
other solvents can destroy the high strength properties
of many engineering plastics - AVOID these cleaners
TURN HANDLE AS SHOWN
ABOVE, THEN PUSH TO OPEN
CAUTION!
Check Exit Operation, Daily.

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Emergency Roof Hatch Exit
All vehicles under 45ft are equipped with one Emergency Roof Hatch, 45ft vehicles have (2) hatches. This hatch serves
as a supplemental exit point in the event of an emergency. The Emergency Roof Hatch is located in the vehicle’s roof,
above the passenger walkway.
The Emergency Roof Hatch is a vital component in the vehicle’s emergency exit system. As such the vehicle driver
should test the Emergency Roof Hatch every day before putting the vehicle into service. To test the System, the vehicle
driver should check:
1. Ensure that each Emergency Roof Hatch is marked by an Emergency Exit sticker. Confirm that the Emergency Roof
Hatch is equipped with the sticker designating the hatch as an emergency exit. If the Emergency Roof Hatch Exit is
missing the Emergency Exit designation sticker, call the Grech Motors Service Department at
1-855-994-7324 and do not operate the vehicle.
2. Each Emergency Roof Hatch is secured by one latch. Actuate the Emergency Roof Hatch by turning its handle from
the “LATCHED” position See Photo No. 1 on page 16 to the “TO EXIT” position. See Photo No. 2on page 16.
3. When Emergency Roof Hatch latch is released, the user can open the hatch by pushing it away from the vehicle. The
Emergency Roof Hatch should swing out and away from the vehicle.
4. If the Emergency Roof Hatch does not swing open when the latch is released and the hatch is pushed, call the
Grech Motors Service Department at 1-855-994-7324 and do not operate the vehicle.
5. Close Emergency Roof Hatch and secure it by returning the handle to the “LATCHED” position. Check to ensure the
Emergency Roof Hatch is secured against the coach by pushing against the hatch while the handle is in the
“LATCHED” position.

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Overhead Parcel Rack
CAUTION!
Do not overload Parcel Racks.
Do not fasten parcels to retainer
bars.
Note: Maximum loading specication for
both model parcel racks is either 20 Lbs.
per foot or 5 Lbs per passenger.
Overhead Parcel Rack

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F-550/Freightliner Drivers Overhead Control Panel
1 Door Switch (open or close passenger door) 8 Climate Control Temperature Adjustment (Up or Down)
2 Door Ajar (
WARNING DEVICE ) 9 Climate Control Switch (Auto Mode) On or Off
3 Reading Lights (optional) Note: Cool mode = A/C on both front & rear
Heat mode = Heat from front unit only (on early models)
4 Rear Door Ajar (
WARNING DEVICE )10 Climate Control Temperature (Setting Point)
5 Interior Lights 11 Climate Control Mode Switch (Air - Heat - Off)
6 Exits (
WARNING DEVICE ) 12 Climate Control Fan Speed (High - to - Low)
7 Auxiliary
6
7
12
3
2
5
41 8 10 9
Note: 4 sec. after setting,
reading shows cabin temp
11
See page 21 for more PROAIR operating instructions

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742 53 61
Note: 4 sec. after setting,
reading shows cabin temp
See page 21 for more PROAIR operating instructions
E-450 Drivers InDash Control Panels
12
810 911
1 Door Switch (open or close passenger door) 8 Climate Control Temperature Adjustment (Up or Down)
2 Reading Lights (optional) 9 Climate Control Switch (Auto Mode) On or Off
3 Interior Lights Note: Cool mode = A/C on both front & rear
Heat mode = Heat from front unit only (on early models)
4 Auxiliary 10 Climate Control Temperature (Setting Point)
5 Door Ajar (
WARNING DEVICE ) 11 Climate Control Mode Switch (Air - Heat - Off)
6 Rear Door Ajar (
WARNING DEVICE ) 12 Climate Control Fan Speed (High - to - Low)
7 Exits (
WARNING DEVICE )