MK-20 Flashcards
What lubricants are authorized with the MK-20?
Only MIL-PRF-27617 type III grease
Who can authorize a substitution of cleaning & germicidal cleaning solution?
An authorized representative of the medical department
What DON’T you use to clean the MK-20?
- Freon
- Bleach
- Trichloroethylene
What is clean defined as for Mk-20?
- Free of all loose scale, rust, grit, filings, dirt and foreign substances when viewed by the unaided eye.
- Free of oil grease and other foreign materials
What must the tools and parts of the MK-20 be kept from?
Oil, Grease, Rust, and other contaminations
What do theses periodicity codes mean? Calendar D W M Q S A 18M
D-Daily W-Weekly M-Monthly Q-Quarterly S-Semiannually A-Annually 18M-Each 18 Months
What do theses periodicity codes mean?
Non-Calendar
R
U
R- Situational requirement
U- Unscheduled maintenance
What do theses periodicity codes mean? Inactive Equipment Maintenance LU PM SU OT
LU- Lay-Up maintenance
PM- Periodic maintenance
SU- Start-Up maintenance
OT- Operational Test
What is the PMS MIP for the MK-20?
5921/172
In an O-Ring, what should the diameter of the O-Ring NOT exceed?
Stretch should not exceed 5%, over stretching may damage the O-Ring
What must be kept clean and dry at all time in a MK-20?
The Amron non-preamplified comms assembly (PN 1406A) & the microphone assembly (PN 1404) because they are not waterproof
What are the acceptable germicidal cleaning solutions for the MK-20?
1- Wescodyne - 6oz with 1 gallon warm fresh water
2- Sanizide Plus - ready to use
3- Advance TBE- ready to use
4- Bi-Arrest 3 - 2 pumps with 16oz of fresh water
5- Confidence Plus- 1oz with 1 gallon fresh water
Are petroleum-based oil, solvents or grease allowed to be used in the maintenance & servicing of breathing apparatus?
No
