LTI Maintenance Flashcards
It is only necessary to raise the cab how high?
High enough to engage the cab safety lock
To raise cab ( power assist)
If the hydraulic motor is running but the cab will not lift, check to make sure that the ____
Pump control knob on the lift pump itself is turned clockwise until it stops
To raise cab (power assist)
Continue holding the switch in the raise position until cab has reached the full tilt position ( approximately ___ degrees)
50 degrees
To lower cab (power assist)
Release the ____ release handle when the ____ clears the ____.
Continue holding the switch in the lower position until the cab has settled on it supports and continue to hold for another ___ sec. to insure that the cab locks are fully engaged
Tilt strut;tilt strut
Tilt cylinder rod
5 seconds
To raise cab (manual)
The pump handle is located behind the_____
Drivers seat
Lower cab;
When the cab is returned to the service position the cab latches will engage and the _____ indicator should be off
Cab lock
Bake adjustment check procedure;
Build up air pressure in apparatus until governor cutout pressure is reached ( approximately ___ psi)
With the brakes released using appropriate ruler or tape measure and record the distance from ____ to ___
*then do same with brakes applied
Subtract the distance recorded in position A from position B , this is the amount of actual push rod travel. If exceeds ___” in front or rear brakes are out of adjustment and require immediate attention.
120psi
Edge of brake chamber to the center of pushrod/slack adjuster Clevis pin
2”
Danger; brake adjustment check
It is recommended that ____ be worn while inspecting the brakes
Always be aware of the location of the ___ and be sure to move away when driver releases presser on the brake pedal.
Safety glasses
Brake relay exhaust port
When inspecting the brake adjustment, it is recommended that the flexible air lines to the brake chambers and brake diaphragms be inspected for air leakage at the same time. These checks will be done with;
Spring brakes released, wheels chocked and service brakes applied and held down
Brakes;
The lining should not be less than ___ of an inch on either pad
1/4
Brakes; manual release (spring)
To manually release the spring brake chamber, unscrew( turn counter clockwise the ___ “ diameter bolt located at end of spring brake chamber utilizing a ___” box end wrench. The bolt should be unscrewed until ___.
The bolt should stick out of the brake chamber approximately ___ “ when fully caged
1/2”
3/4”
Unscrew until it can no longer be turned in the counter clockwise direction
4”
World transmission diagnostic codes;
A maximum of ___ codes may be listed in memory at one time
Before checking codes , x2
How to bring up transmission oil level info
How to bring up diagnostic display mode
5
Bring the vehicle to a stop at a safe location and apply the parking brakes
Simultaneously press the up and down buttons once
Simultaneously press the up and down buttons twice
Transmission fluid does x3
Cools, lubricates, and transmits hydraulic power
Fluid diagnostic read outs;
OL “OK” =
OL “LO” “02” =
OL “HI” 01
OL “OK” = transmission fluid level is ok
OL “LO” “02” = transmission fluid level low 2 quarts
OL “HI” 01 = transmission level high 1 quart above full
In order for the digital readout on the transmission push button range selector to display fluid level the following conditions must be met;
X4
1.Fluid must be above 140 and below 220
2.Transmission in neutral
3.Apparatus has been stationary for approximately 2 min to allow fluid to settle
4.engine is at idle
Checking transmission fluid manual;
1.Be sure fluid has reached an operating temp of ___ to __
2. Park vehicle on level surface, apply parking brake, chock wheelers and shift to _____
3.raise the cab to the full tilt position engage the safety lock. The transmission oil dipstick is located on the ___ of the engine.
4. Start and run engine at idle(___ to ___ rpm)
5. The safe operating level is anywhere within the ___ band on the dip stick
160 -200
Neutral
Right side rear
500 to 800 rpm = idle
HOT RUN
Electrical; alternator
The alternator has a self diagnostic feature. An led is located ___
When engine running led will illuminate ___ during normal operation and ___ when alternator is malfunctioning
On top/center of the alternator
Green= normal
Red= malfunctioning
Batteries give off ____ gas, which is highly explosive
Always disconnect the ____ terminal first , when reconnecting, always connect the ___ terminal last
Hydrogen gas
Ground terminal first
Reconnect ground last
The apparatus has a ____ volt negative ground electrical system
12
Apparatus jump starting;
Caution; voltage supplied to a vehicle electrical system must not exceed ___ volts
- position vehicles so jumper cables will reach east between batteries. Do not allow vehicular to touch.
- Stop engines and turn off all electric motor and accessories in each vehicle
3 apply parking brake and neutral
4.Connect positive jumper cable dead battery to booster batter
5 . Connect end of negative jumper cable to booster battery and other end to ___ of disabled vehicle at least ____ “ away from battery - Start engine of good charged battery. Run engine at moderate speed (___ to ___ rpm)
- Start engine with discharged batteries
16 volts
Frame; 18 “
1000 to 1500rpm
Daily schedule check list x12
- Fuel
- Oil
- Coolant
- Oil, onan
- Coolant, onan
- Brakes, air reservoir (at least 90 psi/ 1min. Brake application test)
- Tires/ wheels
- Signal/ lighting
- Electrical system (12.9 volt min / 13.7 volt min @ high idle)
- Engine (leaks)
- Running gear (power train)- condition/tightness bolts, shafts, cables
- Seat belts
During daily check of brakes, air reservoir pressure;
Verify system pressure in both primary and secondary systems is at least ___ psi at start of shift. Perform ___ test
90 psi
One minute brake application leak down test
During daily electrical system test;
Check system voltage with engine off and all electrical accessories off ( ___ volt min.)
Start and run engine, engage high idle and check voltage again ( ____ volts min)
12.9 off
13.7 high idle
Fuel capacities and type;
Oil-
Trans-
Coolant-
Hydraulic-
Power steering-
Cab lift-
Onan oil-
Onan coolant-
Swing drive-
Oil- 15w-40 - 38 quarts total (4 for filter)
Trans-57 quarts (ATF)
Coolant-62 quarts
Hydraulic-40 gal. AW oil 32 chevron
Power steering-15 (atf)
Cab lift- 4 quarts (ATF)
Onan oil-15w-40 4 quarts
Onan coolant- 5 quarts
Swing drive- 90w gear oil
F-377
All preventative Maintenance checks are to be performed during _____ for heavy apparatus.
Fill out the F-377 for. And have station _______ review and sign. Retain _____ copies.
The first 2 weeks of even months
Station commander signs
Retain one copy and keep in log book the other copy goes to the station commander for filing
Items checked on the apparatus that are in good condition and not in need of service, repair, etc shall be marked with ____
Ok
Members calling in needed repairs shall log on the 377 x3
Name of person contacted
Instructions received
And the date
If reserve has had limited use within 2 month period it is not necessary to fill out entire f377. Fill out only checks you feel are necessary and those listed in vol 3. However the entire F-377 shall be completed on those apparatus _____
At each 6 month oil change
How many BI MONTHLY CHECKS TOTAL
21
Bi monthly steering box and linkage;
Have assistant move steering wheel back and forth ____to ___rapid movements.
40 to 60
377 -Brakes;
Inspect x5
1.Mechanical components
2. Air lines
3 brake linings
4. Inspect brake push rod travel on all 6 wheels (max 2”)
5.shake brake lines and listen for leaks when depressed
377 drive line;
Park apparatus on level surface , chock wheels and release parking brake. Inspect all drive lines and u joints.
The most effective procedure is to_____
Position yourself directly under the u joint, place both hands on the end of the drive line tube next to the u joint try to move up and down. Try to feel for any measurable movement.
377 differential
Oil level should be____
Even with the plug opening
377- air cleaner
Cab full tilt- inspect hoses, ducts, pipe, connections, ext between air cleaner and engine intake for wear, breaks and mounting. Air cleaner element is to be replaced every ______or on an ____ basis.
Every other year or as needed basis
377- Alternator
Inspect for secure mount to engine. Inspect belts, wiring.
Start engine and observe alternator LED. The LED should emit a ____ color if it is functioning properly.
Green
377 cooling system
Coolant should be __ in color. Inspect water pump for proper mount any signs of leakage around the ___ hole and the pump to block area.
Weep hole
377- drive belts;
Inspect all belts for wear, cuts and tension. Report defect if belt tension is loose enough to allow more than ____ deflection measured at a point midway between pulleys.
1/2
377 wiring;
Perform ____ check of all wiring in engine compartment for routing, on connections, wear and or corrosion
Visual only
377- tires
Measure depth at ___ of the tire tread. A reading of ___ or less should be reported on the 377 and called in for needing repair.
Center of the tread
1/8” or less
Speak all lube instructions;
Kingpins;
Proper method for lubricating front axle kingpin?
Universal joints;
When lubricating u joints it is important to ____
Driveshaft slip yoke;
Apply grease to fitting to prevent shaft yoke ___ or ___
Apply grease until____
Brake caliper assembly;
Your apparatus has plugs instead of grease fittings, do not remove. The brake caliper assembly takes a special, high temp, high pressure grease by Rockwell.
The shops will lube these parts when?
Fifth wheel;
When lubricating the fifth wheel, inject grease with tractor ____ , ___ ,and ____
The correct method to lube front axle king pin thrust is to jack up each wheel at the axle.
When lubing u joints observe grease seeping past all for cross bearings
Prevent shaft slip yoke GALLING or SEIZURE
Apply grease until it appears at the relief hole in the end of the yoke
Shops lube caliper assembly at aerial ladder test or whenever brake job is performed
Special lube instructions;
Clean aerial prior to lubing. Stabilize, raise, rotate to side, lower , and extend fully. Clean all residual grease. Use ___ and an approved cleaning solution to do this. Do not use ____ to clean.inspect all pulleys for worn ____.
Inspect ladder for ____ , ___ and ___. When complete hoist ladder to ___ degrees and then retract.
Red rag
Wire brush
Bushings
Wear, dents and cracks
60 degrees
Lubrication;
How many zerk fitting locations
56
Lubrication;
How many zerks?
Ladder heal pin-
Hoist cylinder blind-end shafts-(bottom)
Hoist cylinder rod-end shafts(top)
All =2 zerk
Detroit diesel specs;
___ liters (___ cu.in.)
Engine model:
Torque:
Governed speed
12.7 liters (774 cu.in.)
Series 60
1550 ft lbs @ 1200 rpm
Governed speed
Tires;
Tires shall be replaced when tread depth is at or less than ____. The measurement shall not be made where the ____, ___ or ___ are located.
Tires showing evidence of ___ must be replaced as soon as possible.
Tires showing ANY exposed ____ through tread or sidewall are are to be replaced immediately
4/32
Tie bars, humps, or fillets are located
The tread separating from tire
Exposed fabric
Tires;
Over inflation imposes excessive strain on the tire ____, weakening their resistance to impact. This could cause tire rupture and blowouts.
Cords
What is the principal enemy of tire life and one of the primary causes of tire failure. Causes heating, reduced strength, breakdown, and possible separation of the tire components
Under inflation
When calling for apparatus tire replacement the following info may be required; x 9
Apparatus make
Shop #
Tire size
Tire location
Tread design
Tread groove depth
Circumference or height
Inner or outer
Finish on wheel
Make of wheels?
Tire pressure?
Alcoa
100/95/110
Weekly check; engine
(Deactivate the ____ set high idle with ac at max cool and all electrical accessories on. Monitor gauges inspect for leaks
Load manager
Weekly check; aux front wheel lock;
engine off wheels chocked,
Pull out yellow knob to set brake . Push black knob to set aux front shell lock. Have assistant observe front axle brake actuation, listen for leaks
09-06 tire pressure;
100/95/115
