Does the Crankcase Depression Regulator require any service?

Did a couple searches and got zero results

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2006 Jeep Liberty CRD 142,000 miles New engine 2-2014, Green Eco tune, FS2500 bypass filter Weeks elbow, European Torque converter, brakes front UCA's wheel bearing and front hubs. Front hitch OEM lift pump
98 K2500 Suburban 6.5td
96 K1500 " 6.5td
95 2 door Tahoe 6.5td
94 K3500 cc srw 5 speed 6.5td
91 International Model 6 speed spicer 4700

What’s a depression regulator?

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U.S. Army Retired

CCV? I replaced mine at 180k along with a leaky main seal just to be safe. But, no maintenance required

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05 CRD: H.D.S2 stat,WW Ironrock trilink&LCA's, OX rear,ARB front, 4.10's, ARB bumper, Suncoast,OME 3.5, JBA UCA,rock rails, Moabs&265/75 Duratracs, GDE tunes ,FFD fan,ARP's, 2 micron fuel, new valves,sasquatch battery tray & grid heater, tensioner relocated
Mech fan, VH & AC delete

The CCV puck can be removed, disassembled, cleaned, carefully reassembled, and installed back on the valve cover.
There is a spring and rubber diaphragm inside the puck that must be reassembled correctly.
Or you could just order a new one and install it.

There is also a "J" tube or loop seal as some call it underneath the CCV puck in the valve cover that should be cleaned out with some brake cleaner and a pipe cleaner while the CCV puck is removed. See picture.

See this thread for details:> viewtopic.php?p=927939#p927939

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Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount
98 Dodge Cummins 24 Valve