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Better test stuff > 25FT RB-S Trailer Information > Flashcards

25FT RB-S Trailer Information Flashcards

1
Q

Do not tow the boat unless you have a truck and complete hitch system capable to tow at least ___

A

10,000 lbs

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2
Q

TIN is how many digits?

A

15

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3
Q

First digit of TIN

A

Trailer designator

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4
Q

Second digit of TIN

A

Model year

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5
Q

Third digit of TIN

A

Finish

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6
Q

4th - 8th digit of TIN

A

5 digit VIN code

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7
Q

9th digit of TIN

A

Number of brake axles

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8
Q

10th digit of TIN

A

Type of brakes

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9
Q

Last 5 digits of TIN

A

5 digit capacity

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10
Q

TIN trailer designator

A

K

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11
Q

TIN finish designators

A 
A=aluminum
B=Black
C=Cream
W=White
G=Galv
etc
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12
Q

2nd digit of TIN same as ___ digit of VIN

A

10th

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13
Q

TIN type of brakes designators

A 
0=none
1=hyd drum
2=disc
3=electric
4=hyd drum with park brake
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14
Q

Model year code for TIN

A

A=1980
skips I, O, Q, U, Z
1 - 9
A=2010

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15
Q

Repack bearings how often?

A

At least once a year

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16
Q

The backing plate or caliper mounting bracket is held with ___

A

7/16x1” or2/8x1” bolts

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17
Q

To pack a bearing ___

A

Press the grease into the rollers

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18
Q

Install nut a preload to ___, back the nut off, and retighten ___

A

30 ft/lbs

Finger tight

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19
Q

While installing the retainer take note to line up the ___ with ___

A

Hole in the spindle

A hole in the retainer

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20
Q

Apply grease with a grease gun to the bearing protector until ___

A

The springs starts to compress

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21
Q

Adjusting hydraulic drums, tighten until the drum can no longer turn, then back off ___ clicks

A

7 - 10

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22
Q

Inspect pads for ___

A

Evidence of excessive or uneven wear

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23
Q

Inspect rotors for ___

A

Evidence of excessive wear, scoring, excessive heat build up, cracks, warpage

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24
Q

Inspect master cylinder for ___

A

Proper fluid level

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25
Q

Inspect all bolted connections for ___

A

Tightness

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26
Q

Inspect calipers and brake lines for ___

A

Evidence of brake fluid leaks

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27
Q

Recommended caliper mounting location

A

3 o’clock on left side

9 o’clock on right side

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28
Q

if runout is excessive ___

A

Clock the rotor

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29
Q

Install caliper with bleed screws facing ___

A

Up

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30
Q

Caliper seals, o-rings, etc, are installed with ___

A

A special silicone based grease

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31
Q

Surge brake actuators have normally ___ solenoid reversing valves

A

Closed

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32
Q

The solenoid reversing valve is energized by connecting them to ___

A

The tow vehicles back-up light circuit

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33
Q

Solenoids come in two types

A

Normally open

Normally closed

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34
Q

Advantages of a normally open solenoid reversing valve

A

Quick and easy to install

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35
Q

Disadvantages of a normally open solenoid reversing valve

A
  • The solenoid merely traps the pressurized brake fluid if it is stopped at a downhill attitude
  • If the trailer hits any significant object while backing up, the entire force of the impact is transferred to the master cylinder piston seal, and can rupture
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36
Q

Advantages of a normally closed solenoid reversing valve

A

Eliminates disadvantages of normally open solenoid

37
Q

Disadvantages of a normally closed solenoid reversing valve

A
  • Require a few additional fittings, a short length of brake line, and may require drilling and tapping an access hole in the master cylinder reservoir for a return line
  • Some OEM’s terminate the return line into the top of the master cylinder reservoir through a hole in the fill cap, this may permit water or water vapor to get into the brake fluid
38
Q

Solenoid valves with one wire are ___

A

Internally grounded case

39
Q

Solenoid valves with two wires are ___

A

Ungrounded case

40
Q

Two wire solenoid wires are ___

A

Interchangable, polarity is not an issue

41
Q

Solenoid must have ___ marked on the housing

A

“in” and “out”

42
Q

Older hydraulic drum brake systems require that a ___ be maintained in order to keep the wheel cylinder piston seals seated

A

10 - 12 psi

43
Q

To accomplish keeping residual line pressure, many surge brake actuators have a ___ installed just inside of ___

A
  • Diaphragm type check valve

- Master cylinder output port

44
Q

Make sure the surge brake actuator for disc brakes is designed specifically for disc to avoid ___

A

Subjecting the system to any residual brake line pressure

45
Q

When bleeding a brake system that includes a normally closed solenoid reversing valve, bleed at least one cycle with ___, to avoid ___

A
  • 12V applied to the solenoid

- Trapping air at the valve

46
Q

Bleed which caliper first?

A

Furthest from the actuator

47
Q

After bleeding, ensure ___

A

Master cylinder reservoir is filled, and all bleeder screws are tight

48
Q

Bleeder should point up so as to ___

A

Properly expel trapped air

49
Q

Kodiak recommends bleeding the system again after the first ___ of towing

A

100 miles

50
Q

Hub assemblies should be in what temperature range?

A

130 F to 175 F

51
Q

The Kodiak caliper uses ___ friction pads, specify pad ___

A
  • GM replacement
  • # D-289 organic for Model #225 (same as 1980 - 1990 Buick Skylark - front) and #MD-215 semi-metallic for Model #250 (same as 1983 - 1995 Buick Century H/D- front)
52
Q

Caliper fittings are ___

A

Brass

53
Q

Probable cause, trailer can not back up surge braked trailer

A

12V solenoid valve is inop

54
Q

Remedy for 12V solenoid valve inop

A
  • Check tow vehicle back-up light circuit, check solenoid (should hear a click when 12VDC is applied to lead wire)
  • Check connection to back-up light circuit
  • Check trailer ground connection
55
Q

Probable cause, squeaking, clatter, or chucking (without surge brakes)

A
  • Loose hitch ball
  • Loose hitch
  • Hitch ball worn or too small
  • Broken rotor
  • Worn out caliper pads
  • Leaky caliper
  • Leaky wheel bearing grease seal
  • Caliper/Mounting bracket bolts loose
  • Spindle nut loose
  • Lug nuts loose
56
Q

Probable cause, squeaking, clatter, or chucking (with surge brakes only)

A
  • Worn out shock absorber in Surge Brake Actuator
  • Linkage and pivots on the brake actuator
  • Bent push rod in the shock absorber
  • Bent master cylinder actuating rod
  • Damaged coupler assembly
  • Low brake fluid level in master cylinder
57
Q

Probable cause, one brake overheating, side pull, poor brake performance

A
  • Caliper piston not retracting
  • Bent guide bolt/caliper mounting bracket
  • Side pull
58
Q

Probably cause, all brakes overheating, poor brake performance

A
  • Foreign material in brake line
  • Low hydraulic fluid level
    Broken or pinched brake lines
  • Residual pressure in brake line
  • Brake actuator frame damaged (surge brake actuators only)
59
Q

Check the wheel nut torque at ___

A

10, 25, 50, and 250 miles

60
Q

Check brake adjustment at ___

A

250 miles, every 1000 miles, as performance requires

61
Q

Brake drum should be no more than ___ out of round

A

.020”

62
Q

7” brake drum maximum bore diameter

A

7.090”

63
Q

10” brake drum maximum bore diameter

A

10.060”

64
Q

12” brake drum maximum bore diameter

A

12.090”

65
Q

For electric brakes, the second surface to inspect is ___

A

Where the brake magnets contacts the inner face on the brake drum, called the armature face

66
Q

When the armature face is out-of-flat by more than ___, the face needs to be turned

A

.020”

67
Q

Any time the armature face is turned to clean up excessive wear, the ___ should also be replaced

A

Brake magnets

68
Q

Probable cause, no brakes (disc)

A
  • Broken or kinked brake line

- Malfunctioning actuation system

69
Q

Probable cause, weak brakes (disc)

A
  • Worn or contaminated pads
  • Incorrect brake pads
  • Frozen master cylinder/caliper cylinder
  • Glazed brake pads
  • Excessive rotor face wear
  • Trapped air in lines
  • Overloaded trailer
  • Faulty actuator
70
Q

Probable cause, pulls to one side (disc)

A
  • Incorrect tire pressure
  • Unmatched tires on same axle
  • Restricted brake lines or hoses
  • Malfunctioning caliper
  • Defective brake pads
71
Q

Probable cause, dragging brakes (disc)

A
  • Unpunctured check valve
  • Blocked master cylinder
  • Improper brake fluid
72
Q

When installing hydraulic drum brakes, the ___ shoe must face the front of the trailer (disc)

A

Primary or short

73
Q

Electric brake synchronization adjustments

A
  1. System resistor - regulates max braking power of trailer brakes
  2. Brake controller - controls the tow vehicle brake line pressure at which the controller will begin to pass current to the trailer brakes
74
Q

Before synchronization adjustments are made, your trailer brakes should be burnished in by ___

A

Making 10 to 12 full stops from about 20 mph

75
Q

If the trailer brakes lock and slide, ___ (electric)

A

Add more resistance to the circuit with the system resistor

76
Q

Adjust the brake resistor just to the point of ___ (electric)

A

Brake lock up and wheel skid

77
Q

Make a number of 30 mph hard stops, if the trailer brakes lag behind, adjust the ___ (electric)

A

Brake controller

78
Q

The brake controller should be adjusted so that ___

A

The trailer brakes come in just slightly ahead of the tow vehicle brakes. There should be no jerking or pushing sensation.

79
Q

Grease for brake anchor pin

A

Lubriplate

80
Q

Mounting components for leaf spring suspension need to be inspected at least every ___

A

6000 miles

81
Q

1/2” U-bolt torque (leaf spring)

A

45 to 60 ft/lbs

82
Q

Lug nut cone angles

A

60 or 90 degrees

83
Q

Cause of center wear on tire

A

Over inflated tire

84
Q

Cause of edge wear on tire

A

Under inflated tire

85
Q

Cause of side wear on tire

A

Loss of camber or overloading

86
Q

Cause of toe wear on tire

A

Incorrect toe-in

87
Q

Cause of cupping wear on tire

A

Out of balance

88
Q

Cause of flat spots on tire

A

Wheel lockup and tire skidding

89
Q

How much of the load should be on the tongue?

A

8 to 10%

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