Heavy Equipment Technician (HET)

Fourth Period Package (29 Modules) Comments

Date: 5/5/2020 1:03:42 PM
Module: 190401b
Version: 21
Page: 22
Comment: Replace Figure 34 with one of a Tiger Tool
Status: Approved for Review

Date: 5/5/2020 1:03:52 PM
Module: 190401b
Version: 21
Page: 29
Comment: Universal Joint working angles. reads "although a maximum of one degree of difference is allowed". Should be change to " although a maximum of one to two degree is allowed in some circumstances."
Status: Approved for Review

Date: 5/5/2020 1:04:00 PM
Module: 190401b
Version: 21
Page: 36
Comment: Types of Vibrations first paragraph - There are vibrations that are not pleasant or ad normal. Change ad normal to abnormal Various ad normal vibrations may come from: again change ad normal to abnormal.
Status: Approved for Review

Date: 5/5/2020 1:04:07 PM
Module: 190401b
Version: 21
Page: 43
Comment: question 17. True/False question. should be change or removed. Also both Meritor and Dana Corp. allow for 2 degree difference in the working angle under some conditions and teach that in their courses.
Status: Approved for Review

Date: 5/5/2020 1:04:13 PM
Module: 190401dA
Version: 21
Page: 15
Comment: Block Style Synchronizers should be removed from this course. they belong in the Automotive section not Heavy Duty. Been in the trade for 50 years have not once run across these in the heavy duty side.
Status: Approved for Review

Date: 5/5/2020 1:04:27 PM
Module: 190401e
Version: 21
Page: 10
Comment: This comment and change is in regards to the first paragraph on page 10, which states the following. When the master air control valve is put in the high position, air is exhaust from the right side of the slave vale piston. **Spring and air pressure on the left side of the piston try to move the piston to the right, but the valve piston is prevented from moving by the actuating pin. ** Spring: See note below in regards to the spring. This whole paragraph should read as follows. When the master control valve is placed in the high position, air is exhausted from the right side of the slave valve piston. The constant air pressure supply at the left side of the piston tries to move the piston to the right, but is prevented from moving by the actuating pin. (Figure 10) **Please note that the purpose of the spring inside the slave valve is to hold the service access cap seated against the snap ring cap retainer only. The spring is seated between the access cap and the slave valve housing, and does not come into contact with the slave valve piston. It therefore does not assist with the movement of the piston. Piston movement is achieved through pressure differential
Status: Approved for Review

Date: 5/5/2020 1:04:36 PM
Module: 190401fA
Version: 21
Page: 10
Comment: Objective 3 Overhaul a non-synchromesh transmission to manufacturer's specifications. In Objective 3 we are discussing both synchro and non-synchro transmissions, so the objective should be " Overhaul single and multiple countershaft transmissions to manufacturer's sprecifications.
Status: Approved for Review

Date: 4/9/2020 1:27:25 PM
Module: 190401h
Version: 21
Page: 26
Comment: Figure 31 is incorrectly showing a multi counter-shaft transmission input shaft rather than the inter-axle differential input shaft image as stated by the text. Please source and replace this incorrect image with an appropriate image of an inter-axle differential input shaft. Thanks.
Status: Approved for Review

Date: 4/16/2020 7:34:39 PM
Module: 190402b
Version: 21
Page: 7
Comment: Please replace this image of a vintage automotive steering column with a photograph of a steering column on a modern highway tractor. A new photograph will be helpful to show the greaseable slip spline and universal joints that are applicable to this trade. Please see an image of a steering shaft here, near the bottom of this page: https://beattys.co.nz/industries/heavy-transport Thank you for your consideration.
Status: Approved for Review

Date: 5/5/2020 1:04:46 PM
Module: 190402c
Version: 21
Page: 15
Comment: Purpose of the Turning Radius The shape of the "LOWER" steering arms determines the angles. This toe-out on turns is accomplished by angling the "LOWER" steering arms towards the centre of the rear axle. To prevent confusion/miss-understanding the work "Lower" should be added to the sentence.
Status: Approved for Review

Date: 5/5/2020 1:04:55 PM
Module: 190402c
Version: 21
Page: 42
Comment: If the readings are beyond specifications, one or both "Lower" steering arms will require replacement. The word "LOWER" should be added in front of steering arms to prevent confusion/miss-understandings between upper and lower steering arms.
Status: Approved for Review

Date: 5/5/2020 1:03:34 PM
Module: 190404aB
Version: 21
Page: 16-17
Comment: Please consider updating the posted speedometer calibration information and procedures to reflect modern procedures using available software. Thanks!
Status: Approved for Review

Date: 5/6/2020 9:32:22 AM
Module: 190404aB
Version: 21
Page: 37
Comment: Incorrect name for tests shown in Table 10. Please change title from "Table 10 - Source voltage test" to "Table 10 - CAN-High and CAN-Low voltage tests." Thanks.
Status: Approved for Review

Date: 5/7/2020 9:52:48 AM
Module: 190404aB
Version: 21
Page: 21 and 26
Comment: Please update the information with CAN-3 information that has superseded CAN-1 in 2016. On page 26, please add the new CAN-3, Type 2, 9-pin, Duetsch diagnostic connector that became standard in 2016. Thanks again for your consideration to help keep our modules up to date.
Status: Approved for Review

Date: 4/28/2020 8:44:22 AM
Module: 190404c
Version: 21
Page: 5-6
Comment: Oil Analysis information needs to be supported with images showing 3 oil collection procedures; Vacuum pump ported into a dipstick tube, bleeding from an oil sampling test port, and mid stream collection. Please ensure proper personal protection equipment is worn by the technician taking the samples. Thank you for your consideration.
Status: Approved for Review

Date: 4/28/2020 8:44:36 AM
Module: 190404c
Version: 21
Page: 12
Comment: Coolant Analysis information needs to be supported with images showing 4 coolant testing tools; Hydrometer, Refractometer, 4 strip pH Test Strips, and sterile fluid analysis bottle. Please add an image of Supplemental Coolant Additive (SCA) and Nitrite additive. Also, more information needs to be added to differentiate the tests for the 3 different types of coolant (Inorganic Additive Technology (IAT), Organic Acid Technology (OAT), and Nitrated Organic Acid Technology/ Hybrid Organic Acid Technology NOAT/HOAT). Please add an image of the 7 different colours of common coolant. Please add an image of the results of a Coolant Analysis report. Kindly consider adding more details where coolant can be cross contaminated with lubricants and fuels. Thanks for your consideration.
Status: Approved for Review

Date: 4/28/2020 8:44:46 AM
Module: 190404c
Version: 21
Page: 13
Comment: Exhaust Analysis information needs to be supported with images showing an exhaust analyzer performing a test. Please add information and images for testing Diesel Exhaust Fluid. Please add an image showing results of an Exhaust Analysis report. Kindly consider adding more details of faulty conditions that lead to a failed exhaust analysis test. Thank you for your consideration.
Status: Approved for Review

Date: 4/28/2020 8:45:00 AM
Module: 190404c
Version: 21
Page: 29-31
Comment: Kindly consider adding images of real components to support the drawn images (figure 18-21) in the Internal Stress Created by Directional Loading section. There is not enough information to explain what the drawn images are trying to support. Please add an image to support the Care of Metallic Specimens section. Thank you.
Status: Approved for Review

Date: 4/30/2020 8:34:52 AM
Module: 190404d
Version: 21
Page: 12-28
Comment: Figure 8, images are too small to see or read. Tables 1 to 17 have bullets overlapping the text in their text boxes, both in the paper copies, and in the digital version. Thanks for the opportunity to comment.
Status: Approved for Review


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