Engineer Quick Guide

Question 1

When breathing air in the basket on L201 and L204, what psi should the basket be kept at?

Answer 1

Ideally, the psi should be under 125psi. All the air needed at the basket is 100psi.

Question 2

How much electrical draw is being pulled from the batteries on the apparatus at all times?

Answer 2

There is a 3-amp draw at all times from radio/communication equipment.

Question 3

What psi is needed to release the spring brake chambers on the rear brake drum?

Answer 3

60 psi is needed.

Question 4

The low air buzzer sounds in the cab at what psi?

Answer 4

Low air buzzer sounds between 50-70psi

Question 5

What is the oil capacity of apparatus?

Answer 5

approximately 41 quarts

Question 6

What is the coolant capacity of apparatus?

Answer 6

approximately 55 quarts

Question 7

What is the transmission capacity of the apparatus?

Answer 7

approximately 40 quarts

Question 8

What is the power steering capacity of the apparatus?

Answer 8

approximately 6 quarts

Question 9

What is the primer oil capacity of the apparatus?

Answer 9

approximately 4 quarts

Question 10

What is the hydraulic fluid capacity needed for tilting the cab?

Answer 10

approximately 1.3 gallons

Question 11

What is the emergency air brake used for?

Answer 11

Depressing green emergency button will temporarily release brakes so apparatus can be moved off of roadway – maximum speed 2 mph. WARNING: When using emergency brake release, there are no service brakes.

Question 12

What is a possible consequence of not idling the apparatus prior to shutting down?

Answer 12

Turbo charger temperature can soar to 1000 degrees if not idles for 1 minute before shutting down.

Question 13

What is the fuel capacity of the apparatus?

Answer 13

approximately 65 gallons

Question 14

What is the normal operating temperature for the coolant?

Answer 14

180-220 degrees F

Question 15

What are possible causes for high temperatures?

Answer 15

1. low coolant
2. overuse of retarder
3. belt of shaft not driving fan properly
4. radiator plugged with dirt and debris

Question 16

What is the normal operating PSI range for engine oil?

Answer 16

15-80 psi when cold or at high idle;

5-20 psi when hot and at idle

Question 17

What is the normal range for voltage on the apparatus?

Answer 17

normal reading is between 13.5 - 14.8

Question 18

What are possible reasons for a low reading?

Answer 18

1. loose or missing belts
2. low state of battery charge
3. current load on alternator is greater than alternator can produce
4. defective alternator

Question 19

What are the normal air pressures for front and rear air brakes?

Answer 19

both front and rear should be between 90-130 psi

Question 20

What is the normal operating temperature for transmission oil on apparatus?

Answer 20

160-220 degrees F is normal, with maximum of 330 degrees F intermittently

Question 21

How long should the toggle switch be depressed after cab has settled?

Answer 21

Keep toggle switch depressed for 5 seconds after cab has settled completely and the rear cab locks have engaged. Red indicator light at panel will go off.

Question 22

How much do the rpm’s increase with each push of switch on pressure governor?

Answer 22

each press will increase engine rpm by 25

Question 23

When in pressure mode, how much will pressure increase/decrease with each movement?

Answer 23

when in pressure mode, each movement of the switch will increase or decrease PDP by 4 psi.

Question 24

What percentage is the retarder set for and what does this mean?

Answer 24

Quantum’s are configured at 33% throttle and 67% braking. In other words, the retarder is applied to 1/3 its capacity when the throttle pedal is released. It is then applied to its full capacity when the brake pedal is depressed.

Question 25

How much psi is needed to operate the steps?

Answer 25

85 psi is needed to raise the steps

Question 26

What is a possible solution for steps that aren’t operating correctly?

Answer 26

On newer trucks, there is a main step system compressor cut-off switch, marked in red. If compressor will not operate or steps stay in the down position and raise when the trucks is started, check the compressor cut-off switch position.

Question 27

When checking transmission, what temperature ranges are considered “cold” and “hot”?

Answer 27

60-120 degrees is considered cold;

160-200 degrees is considered hot

Question 28

What temperature “mode” should the transmission be checked in?

Answer 28

transmission should be checked in “hot” mode

Question 29

What is procedure for checking transmission fluid level?

Answer 29

1. park on level surface
2. shift to N, apply parking brake
3. shift to D, N, R, and then back to N and leave engine idling for 2 minutes
4. wipe dipstick clean, check fluid level for appropriate level according to temperature

Question 30

What is the volume that would make up the difference between “low” and “full” on the transmission fluid dipstick?

Answer 30

1 gallon is the difference between “low” and “full”