88m M1120A4 LHS Flashcards

Questions and Answers

What does LHS stand for?

Load handling system

What is the forging water depth and time?

48 in and for 5 minutes

What is the operating range of the system?

300 miles with 154 gallons

What is the gross combination weight rating?

109,000 Signup and view all the answers

What is the maximum speed of the vehicle?

5th gear, 62 mph Signup and view all the answers

How many tires does the vehicle have?

8 Signup and view all the answers

How many air reservoirs does the vehicle have?

5 Signup and view all the answers

At what psi will a buzzer sound for the brake system?

65 to 75 psi Signup and view all the answers

When does the high transmission pump indicator go off?

482° and 350° and 250° Signup and view all the answers

At what pressure does the parking brake apply the brakes?

30 psi Signup and view all the answers

What is the overspeed indicator threshold?

2450 rpm Signup and view all the answers

At what rpm does the engine idle?

625 to 725 rpm Signup and view all the answers

How many batteries does the vehicle have?

4, 12 volts Signup and view all the answers

What does LHS overload indicate?

Payload over 11 tons Signup and view all the answers

What does the traction control switch do?

1 up, inter axle differentials 2 center, off 3 down, engage 8x8 Signup and view all the answers

What does PTO stand for?

Power take off Signup and view all the answers

What does the low fuel indicator signal?

Below 1/8th of a tank Signup and view all the answers

What is the purpose of the LHS joystick?

For unloading and loading flat rack Signup and view all the answers

What is a flat rack in relation to LHS?

What the LHS can carry Signup and view all the answers

What is the maximum rpm for loading and unloading?

1500 rpm Signup and view all the answers

What is the limp home speed for LHS?

10 mph for up to 30 miles Signup and view all the answers

What is the approach angle for the vehicle?

32 degrees Signup and view all the answers

What is the departure angle for the vehicle?

43 degrees Signup and view all the answers

How many tow eyes does the vehicle have?

4 (2 front, 2 rear) 60,000 pounds each Signup and view all the answers

What is the brake system range?

60 to 120 psi Signup and view all the answers

What does the suspension dump valve do?

Inflates/deflates vehicle air suspension system Signup and view all the answers

What is the battery voltage range for the LHS?

Between 24 and 28 volts Signup and view all the answers

How many gears does the transmission have?

6 total gears (5 forward, 1 reverse) Signup and view all the answers

How many brake chambers are there?

8, one per tire Signup and view all the answers

What is the tire pressure for highway conditions?

Front 60 psi, Rear 65 psi, Spare 100 psi Signup and view all the answers

What is the tire pressure for cross country (dry) conditions?

Front standard tire 35 psi, Rear 45 psi, Spare 100 psi Signup and view all the answers

What is the tire pressure for cross country (wet) conditions?

Front standard tire 20 psi, Rear 25 psi, Spare 100 psi Signup and view all the answers

What is the tire pressure for sandy terrain?

Front standard tire 20 psi, Front sand tire 25 psi, Rear 25 psi, Spare 100 psi Signup and view all the answers

What is the highway mode speed standard?

62 mph Signup and view all the answers

What is the cross country (dry) mode speed standard?

40 mph Signup and view all the answers

What is the cross country (wet) mode speed standard?

20 mph Signup and view all the answers

What is the sandy terrain mode speed standard?

20 mph Signup and view all the answers

What is the ABS?

Automatic braking system Signup and view all the answers

How many axles turn in the vehicle?

2, the front two Signup and view all the answers

What are the positions of the transfer case shift lever?

Hi, neutral, lo Signup and view all the answers

What is the transmission operating temperature range?

160 to 220 Signup and view all the answers

What is the maximum rpm downhill that should not be exceeded?

2100 rpm Signup and view all the answers

How many container hooks are there?

Two Signup and view all the answers

What is the height the LHS reaches?

22 feet 2 inches Signup and view all the answers

What is the sequence of transfer flat rack from truck to trailer?

1, 2, 3, 2 Signup and view all the answers

What are the steps for loading from trailer to truck?

Hook, lift, touch, load Signup and view all the answers

What must be checked to ensure the load is properly placed on the truck?

Loading locks, and metal to metal contact each side Signup and view all the answers

What must you do before switching out of 8x8 mode?

Come to complete stop Signup and view all the answers

What must be done before climbing into the vehicle?

Three points of contact Signup and view all the answers

What must be filled out before driving the vehicle?

Dispatch form Signup and view all the answers

What is the order to engage the hydraulic system?

PTO switch on, mode selector then joystick Signup and view all the answers

Study Notes

Load Handling System (LHS) Overview

LHS stands for Load Handling System, which is crucial for efficiently loading and unloading cargo.
The LHS can operate in various environments with a maximum height of 22 feet 2 inches.

Vehicle Specifications

Forging water depth capability is 48 inches for 5 minutes.
The vehicle has an operating range of 300 miles with a fuel capacity of 154 gallons.
Gross combination weight rating is 109,000 pounds.
The maximum speed in 5th gear can reach up to 62 mph.

Mechanical Components

The vehicle features 8 tires and 5 air reservoirs.
An overload condition occurs with a payload exceeding 11 tons.
PTO (Power Take Off) is essential for automotive functions and operational equipment.
The transmission comprises 6 gears: 5 forward and 1 reverse.

System Indicators & Safety Features

Brake system pressure must stay between 60 to 120 psi; a buzzer alerts if pressure drops below 65 to 75 psi.
A low fuel indicator activates when fuel is below 1/8 of a tank.
The parking brake engages if air pressure falls below 30 psi, ensuring safety.
Over speed indicator sounds at 2450 rpm, and engine idle is maintained between 625 to 725 rpm.

Fuel and Power Management

Battery voltage ranges between 24 and 28 volts; the system uses 4 batteries rated at 12 volts each.

Tire Pressures

Tire pressure varies based on operating conditions:
- Highway: Front 60 psi, Rear 65 psi, Spare 100 psi
- Cross Country (Dry): Front standard 35 psi, Rear 45 psi, Spare 100 psi
- Cross Country (Wet): Front standard 20 psi, Rear 25 psi, Spare 100 psi
- Sandy Terrain: Front standard 20 psi, Sand tire 25 psi, Rear 25 psi, Spare 100 psi

Operating Modes & Speed

Standard speeds vary by terrain, reaching up to 62 mph on highways and 20 mph in sandy terrain.
Limp home speed is set at 10 mph for a maximum distance of 30 miles.

Miscellaneous Features

Traction control switch has three settings: engage inter-axle differentials, off, and engage 8x8.
The suspension dump valve controls the vehicle's air suspension inflation and deflation.
The vehicle can tow a significant load, with tow eyes rated for 60,000 pounds each.

Operational Procedures

Proper loading requires checks for loading locks and metal-to-metal contact on each side.
Hydraulic systems must be engaged in the correct order: PTO switch on, mode selector, then joystick.
Always maintain three points of contact when entering the vehicle for safety.
Complete a dispatch form before operating the vehicle.
A specific sequence must be followed for transferring a flat rack from the truck to the trailer: 1, 2, 3, 2.
Unloading from the trailer to the truck follows the mantra: hook, lift, touch, load.

Transmission and Temperature

The transmission operates optimally between temperatures of 160 to 220 degrees.
Never exceed 2100 rpm when going downhill to prevent mechanical failure.

Additional Information

The ABS (Automatic Braking System) is integrated for enhanced vehicle control.
The transfer case shift lever has three positions: High, Neutral, and Low.
Only the front two axles of the vehicle turn during operation for better maneuverability.

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This quiz features flashcards for the 88m M1120A4 Load Handling System, offering definitions and key specifications. Test your knowledge of critical terminology and operational details related to the LHS. Perfect for students and professionals in military vehicle operations.